Corvette Ignition Control Module Test (no spark troubleshooting)

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Corvette Ignition Control Module Test (no spark troubleshooting)

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Күн бұрын

Video Breakdown:
00:20 1994 Chevy Corvette, intermittent no start, new fuel pump installed, code 41 EST Open code
01:22 - RPM signal during cranking
01:59 - checking for spark (in-line spark tester)
03:40 - scope training videos (time base, trigger, sample rate)
KZfaq - Picoscope Basics Part 1 • Picoscope Basics Part ...
- Picoscope Basics Part 2 • Picoscope Basics Part ...
SD Premium - Snap-On Verus Part 11 tinyurl.com/y4...
- Snap-On Verus Part 12 tinyurl.com/y5...
- Snap-On Verus Part 13 tinyurl.com/yx...
03:53 - primary ignition current test (no control found)
05:27 - testing for power on coil + using a test light
06:24 - testing for power to the ICM
07:48 - wiring diagram of this system, description, operation and testing
09:23 - control testing with a test light videos
KZfaq - No Spark Diagnostics "Control Testing" Part 1 a 2014 ScannerDanner Premium video • No Spark Diagnostics "...
- No Spark Diagnostics "Control Testing" Part 2 a 2014 ScannerDanner Premium video • No Spark Diagnostics "...
11:05 - PCM to ICM control signal test
15:40 - power feed test to the ICM
16:46 - ground circuit test for the ICM
17:06 - faulty ICM confirmed
17:23 - control test with a lab scope compared to a test light (no control)
19:00 - warning on a shorted coil damaging the ICM driver
19:50 - code 41 research
23:17 - start/stall you hear in the background was this case study • First Day Filming at M...
23:41 - drunk guy case study
Low Fuel Pressure from a bad fuel pump ground (Ford Ranger)
• Low Fuel Pressure from...
25:47 - next day, new ICM installed
27:19 - coil primary current ramp pattern compared to known bad
28:24 - coil primary voltage pattern (showing control)
29:40 - what good "control" looks like on a labscope
30:17 - what good "control" looks like using a test light
ScannerDanner Tools:
www.scannerdan...
www.amazon.com...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdan... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

Пікірлер: 410

@ScannerDanner 5 жыл бұрын

ScannerDanner Tools: www.scannerdanner.com/tools.html www.amazon.com/shop/scannerdanner Also don't forget to check the description of this video for links to other mentioned videos

@JESUSSDAD 5 жыл бұрын

Why would my ltft be all over the place under load changes when stft seems steady between 0 and +10?

@Mechaniclyfe 5 жыл бұрын

ScannerDanner Btw I have come to notice that some test light flicker tests when checking for spark isn’t always as accurate with led style test lights. Best to use the older style test lights for those tests.

@curlymyhero 5 жыл бұрын

Thx Scanner 4 the link, these tools r amazing and I already got 2 in my cart!

@curlymyhero 5 жыл бұрын

Just wish there were more Mercedes in Pennsyl. 4 u guys to tear apart! I like working on them but they r tricky!

@ScannerDanner 5 жыл бұрын

@@Mechaniclyfe yes, never use an LED type light for this type of testing, first you risk cooking the light and second, very low voltages still make these lights look the same as higher voltage. I almost never use an LED light for troubleshooting. The test light I used in this video is an incandescent style bulb and it is listed on my Amazon affiliate link above in the pinned comment. It is around $20 for that light

@billstevenson7381 5 жыл бұрын

FINALLY! Old school OBD1 diagnosis! Now we're talking. Now, we're in my area of diagnosis. Test lights and flow charts.However, I did enjoy seeing the lab scope used to verify your diagnosis. Thanks , Paul. Great video on control of coil circuit.

@andrewk778 5 жыл бұрын

FINALLY! A video on a GM OBDI car. And on an engine that I actually have! On that engine, every ignition related part is difficult to gain access to. Two digit fault codes and 50 data PIDs. Aahhh, the good old days. A great video. Thank you for sharing.

@1_D333 5 жыл бұрын

For me it's a higher level diagnostic case study involving various potentially defective parts living in different locations. Thank you so much for sharing the knowledge! 👍

@Discretesignals 5 жыл бұрын

The dtc 41 will set if the PCM sees more than 4.6 volts while cranking the engine. The IC signal goes between 0.5 to 4.5 volts. Great video and glad to see you working with your brother 👍. You two are awesome teachers and techs.

@wyattoneable 5 жыл бұрын

As a Corvette fan I appreciate that your keeping them running! Your editing is fantastic Paul. It's always a pleasure to watch your videos. It's very apparent that you take pride in your work. And congratulations on having a shop bay. Nothing to do with this video but I wanted to thank you for all the videos over the years. I recently fixed a vehicle that went to other shops. They gave up. Your classes and videos were instrumental to me in how I found the issue. (2006 Dodge Ram, intermittent crank, no start).

@arthurfricchione8119 5 жыл бұрын

Paul and James, I truly enjoy your videos. Just sent in my monthly subscription and will continue to be a part of your class for as long as you put out videos. Watch your regular and new and improved classes all the time. Your son Caleb is also a big part of your success as he does a great job of editing and the asking of questions all us novices would ask. I know aircraft inside and out and now want to know automotive electronics inside and out. Thank you for that opportunity and answering any questions I might have. Thank everyone involved its a true family effort. also, thank Rosedale Tech for allowing you to do it. Great job ❤️️ Paul I wanted to mention your brother James shop is quite large. Looks like a friendly place to work. Best of luck to all

@ScannerDanner 5 жыл бұрын

Thank you Arthur! I agree, Caleb adds an element that I cannot recreate without him and he has gotten really, really good with editing. Although I take the credit for this one. Caleb has about 2 weeks left before he graduates, then I get to have him full time! I am so looking forward to this and you guys will definitely benefit from him being around more. It has been rough the past few months as he has the lead role in the schools musical/play and he's at practice 5 days a week, then leads church worship on Sundays. No time for SD right now, but that is changing soon!! Thank you for helping me make this possible. KZfaq ad revenue alone simple doesn't pay the bills.

@porscheaaron1 5 жыл бұрын

Finally bought your book today. Great stuff

@toyotatech2jz814 5 жыл бұрын

I'm actually really stoked for more video of the Danner Brothers. Always great content

@N33DS 5 жыл бұрын

Danner, I'm not quite sure whats changed be it softwor techniques. Either way your video editing and flow is insanely better than it was years back. It still worked back then and got the point across. Its just amazing now. Great video Danner(s)

@ScannerDanner 5 жыл бұрын

I'm so glad you made this comment. I really have learned how to enhance the videos with still pictures or previous scenes and also the addition of arrows for what I am talking about. It really take a long time to do this! This video was about 6 or 7 hours of editing and as I was completing this, I was thinking to myself, is it worth the time? Sounds like it was!! Thank you so much

@motorpsykler 5 жыл бұрын

@@ScannerDanner It's absolutely worth the time! THANK YOU!

@leor838 5 жыл бұрын

This vintage ignition was almost always ignition module back in the'90s. ODB one gotta love it.

@Rancidkidd 4 жыл бұрын

Thank you so much for this video. This was my exact problem on my c4. I used noid lights, a test light and a multi-meter and was able to follow along. Also, my car (1996 OBD-II) did not throw any codes. The car died while driving and would not restart, all fixed. Thanks!

@ScannerDanner 4 жыл бұрын

Awesome! Nice job transfering the tests I was showing to the equipment you have.

@haywardsautomotive6156 5 жыл бұрын

Yep Danner was right smart people always had a spare module in the glove box. High failure rate with ignition module along with rotor burn thru, coil failure & distributor cap carbon tracking. Great video and look forward to seeing you guys working together.

@weldingjunkie 5 жыл бұрын

Great video Paul good to see your brothers shop up and loaded with clients. Looking foward to seeing many more videos

@wysetech2000 5 жыл бұрын

You are a pair of talented men. Looking forward to more.

@fire7765 5 жыл бұрын

We appreciate auto technicians like you, thx for sharing.

@Idontwantaname313 2 жыл бұрын

Awesome video. Helped me find out my problem with my 96. The issue I’m having now is finding a good ICM. I bought a delco, Delphi, and a Napa but all were junk.

@nicknicu1787 5 жыл бұрын

Great to see the Danner brothers together! 👍 Thanks for another informative video!

@howifixit6206 Жыл бұрын

Engine stopped in parking lot with no warning. Just did these checks on my '85 Corvette. No flash on the test light. New cap rotor, they were shot even though I replaced them 1 year ago. Coil had power, replaced it and ICM. Is running great now!

@mishadow2685 5 жыл бұрын

Always thankful for the low tech ways to test. Maybe one day I can find a decent scan tool on ebay or some where for cheap.

@ScannerDanner 5 жыл бұрын

the test light "control test" is one of my favorites!

@jrneff9773 5 жыл бұрын

working with your brother that shop better be ready to get busy yall are awesome techs

@diymisfit_Mechanic_UDX404 5 жыл бұрын

And the mounting of the icm, right on the hot head. We put nuts on the bolts behind them, to make make them stand off the head and allow air flow behind the icm.

@ScannerDanner 5 жыл бұрын

That is a great tip!

@MrCoontastic 5 жыл бұрын

A heat sink would help. Be creative, great video.

@diymisfit_Mechanic_UDX404 5 жыл бұрын

@@MrCoontastic They came with heat sinks, but the heat sink were mounted flush against the head.

@MrCoontastic 5 жыл бұрын

@@diymisfit_Mechanic_UDX404 yes meant like a real cpu cooler or they could of just put it all on the firewall too begin with.

@diymisfit_Mechanic_UDX404 5 жыл бұрын

@@MrCoontastic ah ha, yes great idea

@fascistpedant758 5 жыл бұрын

Danner has a pretty nice shop, congratulations to him. I hope we'll be seeing more of the Danner boys in the future.

@ScannerDanner 5 жыл бұрын

count on it!

@MonteD1 Жыл бұрын

I just did all of this yesterday with the same conclusion. Glad i was correct.

@chicanesimon 5 жыл бұрын

Clear and too the point as usual, good vid , Paul's vids never get boring

@ozzstars_cars 5 жыл бұрын

I own a '93 Vette. ICM failure on C4 Corvettes '92-'96 is a common failure.

@throttlebottle5906 5 жыл бұрын

and pretty much every gm products of that era, same module, same heat sink, just different location. often caused by the junk flat-pack dist cap/rotor and wires killing the coil ;)

@ozzstars_cars 5 жыл бұрын

@@throttlebottle5906 the LT1, 92-96 Vettes have the good 'ol Optispark distributor mounted to the front of the engine. Looks like an octopus. 1992 and 93 models that have a water pump leak will turn the Opti into green goo. Coolant drips right into it, improvements to seal up the Opti were made in '94. It is driven by a pin turning at the end of the camshaft.

@weldingjunkie 5 жыл бұрын

More videos Ozz last one was door handle I think :)

@ozzstars_cars 5 жыл бұрын

@@weldingjunkie I will be filming and posting more Corvettes vids soon. Thanks! kzfaq.info

@throttlebottle5906 5 жыл бұрын

@@ozzstars_cars "anti-spark" is more fitting a term :)) right, big ugly flat cap and other gm's had similar but in standard rear distributor location, they'd always burn through internally and you'll get multiple cylinders firing at once, regardless of the button direction and that's without any green crusties from coolant leak! seems a good candidate for electric water pumps, but i don't recall if there ever was such a thing for them..

@stevenkietzke5582 5 жыл бұрын

Reminds me of the early 90s Ford systems. Good videos Sir. Thanks

@stuartcookie133 5 жыл бұрын

Good idea to space the module OFF the head. Get an air gap between the head and module. Usually fixes the fried module issue,forever.

@jeepguymb45 10 ай бұрын

Can u just carefully tie it off the engine ?

@themechanic6117 5 жыл бұрын

top notch. when your brother called you saying it runs perfectly i was not surprised! great video

@billrimmer5596 5 жыл бұрын

Two Danners for the price of one. So Clark is as talkative as ever. Where is Nick? It's gonna be fun!!

@guayaco-dm3vu 5 жыл бұрын

Darn it.. No more Heyyy Peteeeeeee.. Excellent diag. like always Paul.. Its great to see this in action just like the book...

@bigdaddymak1439 5 жыл бұрын

What happened to Pete?

@renetrigueros5891 Жыл бұрын

Gotta say he knows his stuff!

@STABloid 4 жыл бұрын

Thanks for this video! My 1992 C4 just threw this 41 code this weekend. You've just saved me a whole lot of head scratching. Now I know where to focus my attention. It's likely I have the exact same problem, which requires the exact same solution. Now I know how to check it out properly. Hopefully that will have my Corvette running again very soon.

@ScannerDanner 4 жыл бұрын

Glad I could help

@markferraro5250 5 жыл бұрын

great video SD thanks opti spark brings back memories

@danman9017 5 жыл бұрын

boy that remind me alot of the old day diagnostic with test light on module.thanks

@SmittySmithsonite 5 жыл бұрын

Love seeing you and your brother together! SO happy for you guys. We'll never forget the Ranger and the 'Vette - the 2 first diag vids from Danner's new shop! 👍👍 I had never even seen an Optispark system until just recently, when a family friend bought a mid-90's Camaro. Car ended up being more than he bargained for, so he got rid of it - I never got to play around with it (probably a good thing from the looks of it). No idea why GM went that route - I think the HEI was 20x more reliable, at least after each system got 15 or more years on them (IMO). Even the flat distributors on the first OBD-II trucks were a cross-firing, moisture-trapping nightmare. GM never likes to stick with what works ... great for us, but annoying when you own one! Appreciate all your hard work on these vids, Paul! Can't imagine the hours this took to piece together. GREAT job! THANK YOU!! 🍻

@ScannerDanner 5 жыл бұрын

Oh, about 6 or 7 for this one :-)

@SmittySmithsonite 5 жыл бұрын

@@ScannerDanner - Not surprised there! WOW! Thanks for the effort!!!👍 🍻

@marcusweathers7478 2 жыл бұрын

This was the problem with my 92 vette..shop said Opti spark ..then did some testing and called back and said ICM...wow from 1400 to 400.00...great video

@VoltageDropDiagnostics 5 жыл бұрын

Congrats Paul and Danner! Im glad you two are working together! Im sure you two will kill it!

@tracycolorado 5 жыл бұрын

Voltage Drop Diagnostics , or each other, what ever comes first.

@VoltageDropDiagnostics 5 жыл бұрын

tracycolorado ha! Thanks always a possibility when working when family! Lol

@ScannerDanner 5 жыл бұрын

@@tracycolorado haha nah, we're past those days, plus I don't work for him, what we do is mutually beneficial for each other. It is a win, win. If I worked FOR him, you would be right, there would be issues

@ScannerDanner 5 жыл бұрын

thanks man!

@richardendress4494 3 жыл бұрын

"Old Rattletraps"? My '87 C4 L98 is hurt by that comment. Truly cut to the quick. LOL. Great video, thank you. I have similar problems but it takes about 90 minutes before I get the performance drop and attempt to stall.

@shawnbauman5463 5 жыл бұрын

Very familiar with these cars. I own a 93 Corvette and I've worked on a lot of them as well.

@mikechiodetti6737 5 жыл бұрын

Intermittents are fun on the GM systems! Nice Diagnostics, Nice Outcome for the car.

@Gryeko 2 жыл бұрын

Great video, wish I knew more about how to use these tech devices but these types of videos always help, thanks it guided me in the right direction to troubleshoot some issues on my vette. Thanks

@williegillie5712 5 жыл бұрын

That’s a bad place to put a module. The failure rate is high when they sit on the hot engine. You’d think they would be smarter then that. Ford knew it and moved it. Smart thing to do is move the module or make an insulater to mount it to. No doubt it’s gonna happen again.

@luismarty1685 5 жыл бұрын

Even with the glare you still produce great videos Paul.

@dans_Learning_Curve 5 жыл бұрын

Paul, thanks for all the quality content, edits, and reference material you provide!

@dans_Learning_Curve 5 жыл бұрын

I'm also liking the arrows pointing out items in videos.

@ScannerDanner 5 жыл бұрын

Time consuming but worth it for sure

@attilamadarasz3630 5 жыл бұрын

aw job Danner ,test light is 1 of best friend forever.

@CarTourettes 4 жыл бұрын

Thanks a lot for the video, really helped my brother out getting his lt1 back on the tarmac where it belongs here in 🇬🇧

@kyletuttle9064 2 жыл бұрын

Great video always learn when watching.you two brothers are awesome together.

@susie2275 5 жыл бұрын

Keep the videos coming. really well done thanks!

@ScannerDanner 5 жыл бұрын

Thank you! I had a ton of time in the edits on this one

@fervisalbizu306 3 жыл бұрын

Beautiful job love the way the brothers get along scanners explanation enjoy this very very much thank you guys

@mikeburdi3464 Жыл бұрын

Great video. Watching you guys makes me wish I had a brother! 😅👍🏻👌🏼

@lo0ops 5 жыл бұрын

Hey Scanner you're technical so you'll get this. White balance is all about colour tint in any given light. What you were talking about, with respect, is contrast. Loving your work man thanks.

@xristosmaglaras7077 5 жыл бұрын

Perfect... as always Paul..Thank you so much,once again..Don't bother with shots and white balance.Your videos are fine and we will always follow you ...

@bettylane1984 5 жыл бұрын

Awesome,like the old school tech as well! Thanks

@Ambidextriouz 4 жыл бұрын

1. Check for spark at coil wire 2. If no spark check for battery voltage at pins A and D of ICM 3. If no power at A & D then chase pink wire back to fuse 11 for break in wire 4. Check for Ignition control on pin B, use meter or scope and look for .5 - 4.5 Vac or square waves indicating a signal/pulse 5.if no voltage check for continuity from pin B on ICM to black connecter on ECM pin 5, if open or infinite repair wire 6. Check for 5v on A and B of Opti spark harness, and for battery voltage on pin C 7. Fuel pressure should hold 40-50 psi

@NSXTACY420 5 жыл бұрын

Love these videos with your brother, he is a cool dude! Awesome job guys!

@nateb.1568 5 жыл бұрын

I'm glad to be growing up in the days of OBDII.

@ScannerDanner 5 жыл бұрын

It's all the same. The flow charts still suck lol

@nateb.1568 5 жыл бұрын

@@ScannerDanner Lol. At least we have more pids to help give us direction though, and everything is (within reason) standardized.

@PaulCTownsend 2 жыл бұрын

Thank you guys lots of fun.

@billyyoder8171 5 жыл бұрын

Thank you Dos Danners. Good job. I appreciate your videos. Have a blessed and safe week.

@ScannerDanner 5 жыл бұрын

For my DIY guys out there, or for those of you in the field doing some side work and need service information. You can buy access to a single car for $20 for a month, just bill this to your customer or make it part of your diagnostic fee eautorepair.adtrk.biz/?a=10817&c=24&p=r&s1=

@elioselectric468 5 жыл бұрын

Always enjoy your videos with your bro

@mackgoelz6694 2 жыл бұрын

Great stuff, don't have scope so I appreciate the test light method

@matthew53690 5 жыл бұрын

Man thus stuff literally excites me. Thank you for opening me up to it!

@billyr9840 5 жыл бұрын

Nice ! Filming/editing looks great! Tell your brother good look with his new shop. Nice Set up !

@daviddasilva4897 5 жыл бұрын

Good video Paul and Danner you guys are great,fun one

@weskirkland5850 11 ай бұрын

1:02 cool starter, Now I wanna fit that on my 97 Z28.

@slikrhodez3336 4 жыл бұрын

Thanks for this! I drive a 95 Z28 with the LT1! Lots of great info!

@ScannerDanner 4 жыл бұрын

Nice! Tell your Corvette friends 😉

@slikrhodez3336 4 жыл бұрын

@@ScannerDanner I'll tell my Camaro and Impala SS friends, too. ;-)

@nickmayo2974 5 жыл бұрын

This really makes me want to buy a scope... if only I had the money for a pico.

@ScannerDanner 5 жыл бұрын

I have a pocket scope listed on my tools page (pinned comment), it is called a uScope and the master kit is around $400. Highly recommended!

@nickmayo2974 5 жыл бұрын

I have looked at the the uscope, but is having more than one channel worth it as a dealership tech? Thanks for the reply.

@freeusnow6804 5 жыл бұрын

One Thing i do admit Your lighting on the actual lighting on the components is very good..BETTER then eny videos i have seen.wich is excellent.THANK YOU AGAIN FOR YOUR..HUMBLELIZUM...SHOP..JOKE.

@ScannerDanner 5 жыл бұрын

Thank you! I really put a lot of time into the edits on this one

@richardcranium5839 5 жыл бұрын

i forgot about those systems seems there was a relocation to get that module out of the heat and vibrations check old tsb's. ford had the same problem with the thick film modules .

@throttlebottle5906 5 жыл бұрын

good point, also thermal grease breakdown, which was often just plain dielectric silicone grease. I always changed over to white goop and made sure the bole holes in heatsink/dist base was flat, seen plenty over-torqued, which mushroomed the mating surface and held the module off the base.. they couldn't figure out why the modules lasted days to weeks lol..

@ScannerDanner 5 жыл бұрын

@@throttlebottle5906 yeah, the new ICM came with the dielectric grease and not the good white goop stuff lol

@paulmonk7820 5 жыл бұрын

@@throttlebottle5906 I recently spoke with you on another site...you keep good company.

@throttlebottle5906 5 жыл бұрын

crazy ole me? I just bounce and ricochet around wildly, sometimes pretending to be dumb(lazy) depends on the time of day and having partaken in tasty adult beverages ;)

@laohantun7404 5 жыл бұрын

Brotherly working together....so cool......

@kevinedward1234 5 жыл бұрын

Paul, great video,as always!!!!!!!!!!!!!!!!!!!!!!!!!

@poormiserablesinner4600 5 жыл бұрын

I'm still old school. Not only do I carry a extra HEI module on my truck. I also have a extra cap & rotor too.

@manuellamas4747 5 жыл бұрын

Real good video like always. Huge blessing working with your brother. Your mom I bet is very happy about that. 🙏🙏🙏 for your Mom.

@ScannerDanner 5 жыл бұрын

Mom loves it! Thanks brother

@fmbfla 4 жыл бұрын

Great vid and great Diag. had one 95 Vett in for CEO of local NBC station in for a No Start and noticed a leaking W.P. on the cam cap diaged a Module and replaced the DIST unit but DIDN'T REPLACE the COIL later in the week vett back for interment stall, cut-off and no start.... WTF.. Back at the shop Starts ..runs ruff and rich.. Bang Bang on the PCM and pow BTN. bad coil = bad MOD= bad PCM =$$$ Moral of the story, Replace all ignition components on this type vett at the same time! Period... the initial problem was the water pump leaking on/into the cap.. Popped the module and it was replaced, but latter to find out that errant high voltage back feed into the ECU. Try finding an ECU for a 95 Vett cant... have to have the ECU rebuilt at a cost higher than they cost new. REPLACE ALL

@henryrobinson9837 5 жыл бұрын

GM produced the diagnostics before the vehicle was ever on the lot,they used to have SMU by the thousands ever time a new design of fuel or ign. system was used

@mrae3551 5 жыл бұрын

Another great video and use of a lap scoop as far as the code gm did not have logic diagnostics on distributor type ignition systems with a single coil and the Ignition module is not bi-directional and only reads PMW from the ecm and The ecm would look for a 350rpm and higher with in a short time frame and would increase ilde to prove that the engine is running if this is not meet the ecm will give you that code

@ScannerDanner 5 жыл бұрын

thank you! confirms what I thought as well

@echadmiyodea 5 жыл бұрын

The C5's all have issues with the body grounds and corrosion. It would be nice to see you go through one of those as it pretty much applies to all C5's as they all eventually start getting intermittent electrical issues.

@ScannerDanner 5 жыл бұрын

If I see one, you can count on it!

@Muddytrickle 4 жыл бұрын

I am about as amateur as you can be. I can replace parts and some basic troubleshooting but I love the logic you lay out here. Very solid help.I do not have a cool scanner, Danner. I have one of these boat anchors in a 1994 S10 Blazer, painless wiring harness and MSD coil and distributor. Crank no start. I have signal at the injectors, I have signal at the coil, I have fuel pressure, but no spark at the spark plugs. Can anyone "talk me off the edge of the cliff" cuz I feel I should replace the opti but I want to be sure. ICM I did replace.

@ScannerDanner 4 жыл бұрын

Was the MSD coil and distributor one that is direct plug it or did you modify the wiring?

@Muddytrickle 4 жыл бұрын

@@ScannerDanner if there were wiring mods, it was done by the previous owner. However, everything seems to be coming off of, or connecting to, original wiring harnesses or to the Painless harness. It ran and drove, i let it sit and then it would not start.

@ScannerDanner 4 жыл бұрын

Is it a flat distributor cap with the plug wires on the sides?

@Muddytrickle 4 жыл бұрын

@@ScannerDanner - yes it is.

@ScannerDanner 4 жыл бұрын

@@Muddytrickle okay, is spark good at the coil itself? It should jump more than a half inch gap. I use an incandescent test light for this test. DO NOT use an LED light, it will cook it.

@HATTAFRASHED 5 жыл бұрын

really nice...amazing channel

@vencentbauer 5 жыл бұрын

James is too funny I remember in the day people kept points and balance resisters in glove box mopar got to love em lol

@nasrou18111988 5 жыл бұрын

thank you so much from africa your videos very helpful to us we learn from you thank you

@willyanickevenor1983 5 жыл бұрын

hi following you from Mauritius island,nice your tutorials

@tonyhughes7792 5 жыл бұрын

Great analysis Danner thanks.

@29auto30 5 жыл бұрын

So much good info,thats why you don't fast forward a ScannerDanner vid....BTW were not looking at your face.LOL Just listening to the Knowledge.thanks for the video!

@ScannerDanner 5 жыл бұрын

awesome comment, thank you!

@eastprestonclassics3963 4 жыл бұрын

Thank you for your reply much appreciated I have fuel pressure I will check the injectors next 👍🏻 keep you posted

@ScannerDanner 4 жыл бұрын

I have videos on shorted injectors on these early model GM systems

@eastprestonclassics3963 4 жыл бұрын

ScannerDanner I’m watching one now 👍🏻 I’m going to be doing some filming on it soon for our new channel any pointers are greatly appreciated all the best jay

@ScannerDanner 4 жыл бұрын

@@eastprestonclassics3963 if it is an injector short, you will have good spark and good fuel pressure and no injector pulse when you test for it. You can take and unplug one injector and test it with a test light. I have some videos on testing fuel injectors too. If you have one, a noid light comes in very handy for this test

@eastprestonclassics3963 4 жыл бұрын

ScannerDanner The car cold starts and runs really smooth for a car of her age after about 6mins it then dies and won’t re start and at this point I have no spark but still has power going to the opti .I replaced the coil but not the ignition module as the paper work said it had been changed but I’m not sure 🤔

@ScannerDanner 4 жыл бұрын

Okay, then don't worry about the injectors and do the tests I've shown in this video with the test light to confirm module operation. Make sure it is an incandescent test light, if you're using an LED type light, throw that thing in the garbage, they are useless for troubleshooting

@andreahowatson8611 5 жыл бұрын

What would you look at next if the icm module and coil are fine, but car intermittently stalls while driving or stationary?.

@ScannerDanner 5 жыл бұрын

depends on what it does after it stalls. #1 when it stalls does it immediately restart or does it take time? #2 if it doesn't immediately restart, if you open the throttle a little will it start back up? #3 if it doesn't restart and it still doesn't restart after opening the throttle, then you need to find out what you are missing (spark, fuel pressure, injection pulse) for me to help any further.

@andreahowatson8611 5 жыл бұрын

@@ScannerDanner Thanks Paul, It would restart right away until we replaced the coil and ICM, now it takes time. We will run those other checks. FYI it doesn't throw any codes, and at present won't link to our OBD2 scanner. Cheers

@amadafaka 5 жыл бұрын

Whatever happened to the guy with no bills and fancy tools? Clark was hilarious in James videos. Good to see him again.

@ScannerDanner 5 жыл бұрын

who would that be? not sure

@amadafaka 5 жыл бұрын

@@ScannerDanner He ran an engine on a stand one time.

@ScannerDanner 5 жыл бұрын

@@amadafaka oh, Nick was his name. He is no longer there

@jackjohnson9989 5 жыл бұрын

Just one thing missing: Since the purchase of the ....er....shop, now that everything can be done in-house, one was anticipating a mandatory acceleration test on the Corvette - just to confirm the efficacy of the repair of course!

@johnaclark1 5 жыл бұрын

I gotta get used to the new common phrase, "Hey, Danner, can you crank that for me?" After watching you in your classroom with the Danner license plate it's weird to hear you calling someone else Danner!

@ScannerDanner 5 жыл бұрын

It's a good thing though because it will educate the masses that I'm NOT Dan! Lol

@kevinshasteen5682 5 жыл бұрын

Just the words "Opti Spark" trigger pshycological twitches in anyone that worked in the OBD 1 days; ohhh the horror ;) Good vid as usual

@anthonyskorner4511 4 жыл бұрын

A lot of people talk smack on the all the "new electronic systems" but they have no clue.

@james69roy 5 жыл бұрын

It Is Nice to See yall working together Paul your are Gonna have to Video bomb James A bit more XD!!!

@billydankert1764 2 жыл бұрын

Thank you very much your going to do good !!!!! Keep it up !!! I mean great !!!!!

@jonclark1288 5 жыл бұрын

I still don't understand the purpose of the ignition control module. Seems like it receives the signal from the ECM and just relays that signal to the coil. Why not just have the ECM send the signal directly to the coil? (Yes, I know many vehicles do have the ECM send the signal directly to the coil. Still doesn't explain what the ICM actually does to the signal before sending it to the coil.)

@ScannerDanner 5 жыл бұрын

Jon, there is a main power transistor that is controlling and carrying the current flow of the primary ignition coil (up to about 10 amps typically), that is what the ICM is doing. On newer style ignition coils (one for each cylinder), if there are 3 or 4 wires going to it, the main power transistor is located inside of the coil itself, essentially they combined the "module" with the coil. On 2 wire designs, the main power transistor is part of and inside the engine computer, so no more ignition modules on those designs. They've basically put the ignition module inside of the ECM board. Make sense?

@jonclark1288 5 жыл бұрын

@@ScannerDanner so the transistor/module is there just to handle the high current? Sorta like a relay?

@ScannerDanner 5 жыл бұрын

Yes! And that small square wave I measured coming from the computer is only a few hundred milliamps, if that. No heat at all on the ECM board to control the coil. That signal is the base circuit turn on voltage for the main power transistor in the ICM

@jonclark1288 5 жыл бұрын

@@ScannerDanner got it, thanks for the explanation!

@name9287 5 жыл бұрын

Great looking shop

@AdamWee89 5 жыл бұрын

Looks very easy to work on! Aha great video keep it up danners! 😊

@franciscomartintijerinocas6079 5 жыл бұрын

Saludos y gracias maestro buen aprendizaje en los temas los llevo a cabo

@pigeonsil240sx 2 жыл бұрын

i want to rock a shirt that says "hey danner come crank this!"

@basedeal 5 жыл бұрын

What’s wrong with being a parts changer?

@ScannerDanner 5 жыл бұрын

Nothing as long as your definition of being a parts changet involves changing the part that needed to be changed and not just throwing a part at it to "try it'

@moodberry Жыл бұрын

Just found your channel. Wish I had you as my mechanic locally. I have a 92 vette with a code 41 that I got from the dashboard, but I think yours has an OBD2 port, right? Mine is an OBD1, and I don't have a clue what scanner to buy. I checked Amazon for a used one. Didn't know what to buy. Do you have any advice for someone in my shoes?

@ScannerDanner Жыл бұрын

Code 41 is a cam sensor code? 42 is electronic spark timing. 41 I can't remember