Another fine video. I'm going back through and watching all Dave's old vids regarding the Cummins trucks like mine. He knows his stuff and is an excellent resource.

The only other instance where we would advise a full set is where the vehicle has higher mileage and the failure in one injector can be traced to normal wear and tear due to the high mileage. In that case we would reason that the remaining injectors are approaching the end of their life as well, as they will have been in the engine for the same length of time, but we'd still leave it up to the customer. We'd give them both options and explain the reasoning behind both.

You sir are a good and honest human being

Thank you for the information! As a newbie in the diesel world I greatly appreciate the time and effort.

Best tech videos out there! You have a decency and knowledge base which reminds me a great deal of diesel tech Ron . (RIP)

I appreciate your comments and the fact that your so responsive,we also live in a commission based world and the techs get a piece of the action,the other end is the shops that co-sign this by pushing big tickets. I love your quest to arm us with knowlege,I myself am a fan of dealerships,from my own experience,there's alot of good and bad shops across the board.dealership or independent.

From a fellow diesel tech, well said

David, you always do a great job with your videos. Thank you for helping us make good choices.

Excellent video. Glad to hear another honest trained opinion.

Good info young man. Enjoy your videos. I used your info to replace rear rotors on my 4500. Appreciated! !

Hi Dave, Thanks for sharing the truth about diesel injectors. Enjoy your channel.

LUCKY YOU, YOU ARE A GREAT, KNOWLEDEABLE TECH. THANKS

Great content David. Thanks for sharing your knowledge.

Good information, Sir. Could save truck owners much grief and $$$$. Thanks for posting.

I've been a diesel owner for 20 yes. been throw six of them. from duramax to cummins. and the info you gave is on point. good job man

One good thing you can do is to get a decent OBDII plug in code reader. I have an Edge so I can read the codes. Get the code, plug it into google, and then follow some of the links on forums specific to your vehicle. When I had an injector go, I had the code saying injector failure. Found a very close shop that specialized in GM first, they knew which injector. Then they sent me on to a shop a bit further down the road specializing in the Cummins. That shop was superb. Those two shops always referred customers back and forth. Fixed while I waited. One injector. That was well over a 100000 miles ago and all the other injectors work just fine. So get that code reader. You don't have to know a thing about fixing it, but you can know what it is the onboard computer is telling you.

Another great video thanks for sharing your knowledge

I appreciate the information. I had to replace the #7 (Duramax) prematurely because it was leaking through the body. I was tempted to replace all of them but it's been 5 years and no problems with the others. I'm taking lessons in auto repair so I can be that educated customer. :)

Thanks for the great advice! Awesome channel..

Thanks for the videos

Good video and good points. me personally at that point I'm pulling them all and sending them out for testing and going off those results

I've got the same issue and my guy says we need to do all 6... shit is pricey though and I think I'm gonna have to get it towed to another shop... I watch all your videos and I appreciate all the knowledge

At cummins the #1 reason we replaced all injectors was due to excessive black smoke or excessive regens. #2 water in fuel issue. Hard start or low rail pressure usually easy to diagnose, rarely requires all six.

Great info Dave. Your the man!!

I found this vid. In the pile seemingly never ending performance vids and articles all saying always replace all 6 in an 06 cummings... So I lost number 2. On a truck I bought new with 8 miles on it. It currently sits on 130 thousand. I have got fuel all over the western states. But 90 percent comes from one local gas station. Now I do use cans a lot since this is my hunting ,travel ,camping pickup. But I have wrenched on big diesels for a long time. And was a locomotive mechanic for a decade or so. With some truck experience on certian engines. We would swap out one injector all the time on those motors. Never would a guy who.makes his living with his dump truck want every injector replaced before he knew they were bad. Who wants to run that truck for a week and a half for free to pay for somthing that ain't broke. So this vid really reassured me nothing's changed on this oil burner compared to those. I will ohm them then have them flow tested. Add some better filtration and monitor them with incab monitor. See what happens

While every video regarding a Cummins and diagnosis and repair that you make is very informative and educational this one may be one of your best and didn’t actually teach anyone a damn thing about their truck so much as the knowledge to know if they are getting bent over or not. I’ve been working on and driving diesels for 30 years. You NEVER replace all the injectors when only one fails. Good info man!!

Good video thanks for your help.

good advice!

Great video

Doing my 5.9 injectors tomorrow myself. Bought factory new Bosch injectors, tubes and lines for 2700.00. Sure it probably has only one bad injector, but I’m bringing the old truck back to life. Tired of wasting money at the mechanic for substandard service at a high price.

Thank for the good informational Videos. Maybe this is not a good place to tell this story so if not just ignore this. I have a story, 2019 ram 6.7 put DEF in fuel tank, (has push button start) did not start or press the accessory button. I had called the diesel garage and the are the ones that told me not to start the truck or press anything that would engage the electrical system. When the tow truck driver pressed the accessory button to lower the power window on the drivers side to steer the truck while pulling it onto the tiltbed. I was a little surprised when he did this but though well I guess he knows that he's doing. The truck was moved to the diesel shop where they drained and flushed the tank and started the engine, it ran for and minute then stopped and couldn't get it started again. In all honesty the last conversation I had with the diesel shop was they were working with information that the truck had not been started or any accessories touched. The diesel shop gave me an estimate of $1,8000.00 to bring in back to life. I wanted a second opinion so I had it moved to a dealership. They drained the tank replaced replaced the lift pump, filters, and I think the high pressure pump and maybe the fuel rail. Runs like it never happened, but was hard to start a couple of times and the engine light has come on three times, with a code saying low fuel pressure and cyclinder 3 low volts. First time they changed fuel filters and said they were pretty cloged up with debris, second time same filters but not as cloged, third time filters clean. Light is on again and they want to change all injectors, I asked why not just change just the one showing the number 3 low volts. Anyway they are giving me two qoutes, between 1 or 6 injectors. The truck runs so good I don't understand why 6 injectors. Iguess I feel like if I choose to replace one injector I am taking a chance that maybe the rest might decide go bad at a latter time. The truck run great just the way it is. Thanks

To replace one injector costs a lot on a 6.0 Powerstroke, a lot has to be removed, if you have a lot of miles on your vehicle, it makes sense to replace them all and upgrade the high oil pressure, dummy rail, and plugs, etc, So it boils down to your vehicle's mileage. There is so much labor involved for just one injector, you are better off replacing them all, depending on the miles you have. Now I am talking about the 6.0 Powerstroke.

Add caveat to that… high pressure fuel pump failure requires all six to be replaced. Along with rail, lines, lift pump HPFP, sensors, regulator and filters.

Have always questioned why replace all of them. I never have on any of my gas engine trucks that I used to own and will do the same with my '15 Cummins. Great videos man keep them up. By the way heard when yall might be getting the new water pumps in? yep you work where I buy my trucks at. Again thanks for the extra work making these videos.

Thanks man my 6.7 had like a misfire and the shop i took it the guy was kinda jerk but I let him know I know some but not all about Cummins so he sais it sounded like a injector stock open . any idea if I can take the injector apart to clean it

David, I'm replacing two injectors in my 2013 6.7 Cummins. I keep reading about correction codes to the ECM. How do I personally get these codes from the injector to the ECM? Or does the ECM read and correct? Thanks for all your great videos, they've been a great help!

Great video! I wish there were more diesel mechanics providing this kind of honest feedback and advice. Diesel repairs are expensive enough; dealers and repair shops shouldn't be charging anymore than is necessary. Keep up the good work!

Interesting!

Thank you thank you! You just took a load off my mind and left a load in my wallet. Awesome.

i wanted to ask a question i have a 2008 dodge ram with a 6.7 and when im driving up hill it will not keep a consistent rev it will seem to be choking until u gas it hard what could it be?

Great video MotorCity man. My truck started blowing white smoke all of a sudden going 60 mph on the hwy. pulled over and it was running real rough like a tire was flat. Put it in park and it stalled. Doesn’t want to start anymore. 95k miles, 2011 6.7l. Got three DTC codes. P0303 cylinder #3 misfire. P2262 and P2280. Is this signs of a failed injector? Any test I can do myself?

Dave I have a 2004 2500 Dodge Ram 5.9 l is been seating for little over a year with out been started battery are disconnected should I be worry about humidity in the engine or rear and front ends

What about injector orifice wear? Is there any reason to replace all the injectors at once to keep the injectors tip wear identical?

question David....? the injector in a diesel it can be clean? if is just one injector

I have a story, 2019 ram 6.7 put DEF in fuel tank, did not start truck but accessory button was

So I'm having a P0191 code and the dealer is telling me that I need to replace my injectors but the truck runs awesome what is your advice

David, Your video's have been very helpful since purchasing my 2015 Ram 3500 6.7. ....? For you is while (first start up for the day coolant temp at 125 - 185.) accelerating it happens at at a 2nd red light 1/2 mile to 2miles from home 3 - 4 times a week. Issue is a pause, delay, or hesitation at point of acceleration from about 1/2 second after pressing accelerator lasts just a split second. .....I noticed Geno's Garage offers a ( Throttle Sensitivity Booster ). Pedal lag. ......Is this my problem and fix and is this a common issue with 6.7L. Can I........just live with it or is something I need to address? ....had to replace rear Nox 2 sensor module about three weeks ago. Mechanic said it could have been causing the problem and may fix it. Wrong! Thanks, Jeff

How loud should a injector in a 2015 6.7 Cummins be? I have a knock that sounds like a 12 valve. With a bad smell but have no smoke? Exhaust will burn your eyes.

Am so glad I find you. Dodge Deler want to charge us 6000 dol for 6 injectors we can't afford it but we need the truck. The truck cough after we press the accelerator and a lightning Shows in the dash. Any help will be appreciated. I apologize for my bad English.

Y2k 5.9 200k miles here... noticed past few weeks my truck seems to run rough on idle... I'm suspicious that one 💉 is clogged or bad.... no loss of performance noted or smoke above normal... what you think

Thumbs up!

Hmm 🤔 one thing you didn’t mention was mileage on the injectors. If you have one injector go out on a Cummins with 200k miles, wouldn’t you go ahead and replace them all? A bad injector can take out a piston easily and then the 3k for a set of injectors is relatively cheap compared to a full rebuild. Thinking out loud because I have a 2006 Dodge Ram 3500, a 5.9 Cummins with a little over 200k miles. I’m considering a full injector replacement and capable of doing the job myself, so no mechanic or business is influential to my decision. The truck runs perfectly but knowing that injectors last an average of 200k depending on many factors. I have factory fuel filtration but replace the fuel filter every oil change, 7-8k miles. Stock truck with bolt on Banks Ram air, 4” exhaust from turbo back and Edge Juice with attitude tuner. The replacement would be preventive maintenance as far as I’m concerned. I’m a CNC machine tool service engineer and not a mechanic but it makes perfect sense to me. Your video doesn’t mention any of the horrors that a bad injector can cause so it didn’t change my mind about replacing my injectors as a set before they fail, because they will fail. This is my daily driver and I need it dependable. Great video though, I just disagree with your train of thought about this.

Dave can you install an oil/coolant cooler on my 2015 Cherokee Trailhawk 3.2 pentastar ? I'll drive from Illinois to Detroit for the work. NO KIDDING !

I believe I got some bad filters. The primary stopped up and it’s been hunting at idle ever since even after I changed the filter. I’d love to know how to figure out if it’s my injectors. I’m a diesel mechanic on the older diesel’s. Lol that makes it worse. I’d greatly appreciate it

I personally would change all the injectors...its like replacing only one brake pad..If ones going bad.. they will all follow...If you got it apart..go thru the rest.. Pay now or pay again later to take it apart again . Esdpecially if has high miles JMO

Hhhha you are the last mechanic with Jesus mind surviving on earth. Love it.

Question: Once I’ve looked over a truck (Cummins) especially a 5.9 what To look for in a high mileage truck as far as 5.9 engine and transmission good and bad Thank you for your time WjM

Stock OE Bosch injectors are only about $500 for a set of 6 shipped with new tubes for a 6.7 ...I mean if I got 150-200k on my truck and I got shitty injector I'm just going to put 6 new ones in why I have it apart ... thankfully anyone with an IQ above 85 can do injectors on a 5.9 or 6.7 so it's $500 job for anyone wants to do the Job in their driveway.

How do you feel about FASS or airdog pumps to save injectors? Are they worth the money?

Howdy! Another great video! I have 223k on the truck, bought it with 194k, it's a 2012 ram 2500 w/6.7. I have been running BG products in the fuel, I have had the best results with that cleaner in even my gas engine vehicles. At what point should a person pull the injectors and have them replaced or professionally cleaned? I have heard ppl getting 400k out of the stock units, so wondering if that is generally a true statement. I have seen some videos of people tearing them down and cleaning, but I can't find an actual rebuild kit for these injectors. Love the vids!

Personally what I like to do on mechanical injectors on the earlier 5.9's is have them cleaned and POP checked and set as close to the same pressure as the strongest injector. Cylinder balance is easy to screw up if your mechanical injectors are high mileage and you replace only one without cleaning and setting injector POP on the remaining 5. The old mechanical injectors usually don't just wear out even with contamination. These injectors typically are much more tolerant of foreign particles in my experience. The only time I have seen the older injectors replaced is when something fractures or the nozzle or pintle overheats.

I have a 2018 6.7 with 120xxxx miles and my check engine light came on and it comes out on the code reader that its fuel injector #1

Thanks for the advice. I took my 07 6.7 Cummins to a so-called reputable shop and they wanted $5100 to replace the injectors and associated parts. Said "the injectors are bad." Didn't test the fuel system for contamination or do any real diagnosing. I left and paid the $99 "diagnostic" fee. Still on the search for someone to help, no one seems willing to really diagnose anything. Any tips for locating the bad injector? I've tried measuring exhaust temps, but my sticking injector is so randomly intermittent that it's hard to nail down.

Dave what if I have a bad injector, but because of money want to but nozzles on them later. Will one injector being a different brand have any affect on volume of let's say 150 hp nozzles?

I've been hearing that when the "wait to start" light comes on and truck "dings" 10x while driving it's time for new injectors because of high return rate. Is that a possibility?

Have you seen this issue with timing slippage from bolt on camshaft loosening

Have them Pop tested to see if there atomizing correct.

You mention "high mileage"what's considered high mileage

Thank you..mechanics are like lawyers..you take their advice as gospel..most are DISHONEST...You sir are HONEST..this is why I SUSCRIBED

Everyone has their opinions but as a 15 year diesel and heavy equipment tech I can say to many times have I seen the customers cheap out and buy just the failed injector or two. I always recommend a set due to I have been back to countless machines and trucks putting the remainder of injectors in due to us only replacing the one of two that faild. I run a freightliner m2 service truck with 2018 6.7 isb, I lost the #2 and #5 hole two days ago. I replaced both injectors and today 2 days later I lost #4 so I am replacing the set at this point. Diesel is not contaminated as I sent off a sample to be analyzed. I do not sell parts and when I do it's at cost so there is no benefit to me replacing one or six. I have however replaced just one or 2 and been fine but also have done just one or two then went back for the rest. I work remotely average day is 200 to 300 miles at 2 bucks a mile and 135hr, can you imagine how mad the customers are when they just do the one that failed then I'm traveling back again to do the rest! That is way more costly then just doing all six at once. I know I'm ranting but don't S#&+ on the guys that are informing customers they could have further issues down the line and honestly trying to prevent further headache down the road. I work on all brands on and off road and may have some experience with this kind of thing.

My step-father had all 8 of his Ford injectors replaced. I bet he only needed 1 or 2 replaced. $500 for each injector plus labor.

Hello, like your channel, plenty of correct info. Not a bunch of monkeys with a gopro and some wrenches. Please,if you would. The next time you you do a full brake job on 2005 to 2008 magnum/charger/300, post it. Thanks for all the the Pro advise. Pardon the off topic. wanted to post to your most recent vid.

So just had my alignment done at the dealer on my 16 Ram 3500 dually mega cab because my front left tire was wearing really bad. Anyway dealer told me that I need my injectors serviced. I tow a 20k# trailer nearly every day and have 32k on the truck. Are they full of sh!t or is this normal? Also what does this service entail?

How about if they have 150,000+ miles on them? Is there a max mileage limit?

I completely agree with you, but you should have mentioned motors with high mileage, that haven't seen diesel additives, or good clean fuel. Injectors can lose their effectiveness over time due to their constant cycling. But overall I agree with you, "your motor has a miss, soo were gonna put in a new motor"? Fixes the problem, just not cost effectively! Lol

I couldn't agree more. Had a 2003 duramax 40k miles and went to start it in the morning...almost hydrolocked. It was under warranty and they did replace all of the injectors...but if it wasn't under warranty I would have repaired it myself and figured out which one was hanging open and filling the oil pan with fuel. Which ever cylinder it was would have been soaked with diesel and identified the faulty injector. At $500 each u bet! That is what I take from the point given here...why would a dealer just replace them all? DIAGNOSE PLEASE :-)

The medical field is becoming the same.

I have a 2016 ECO DIESEL Should I add a fuel additive ??

Hope you can help with my problem. So I just bought a 05 Dodge Ram 2500 w/ 80k miles and 2 days after I bought it the truck started blowing black smoke it’s fully stock other then a airdog 150. So I took it to a shop here in Southern California and they diagnosed it and said they couldn’t figure out why it was smoking, so they suggested to have the injectors pulled out to have them tested I said ok. Yesterday they call me and tell me there is 5 bad injectors I don’t remember how many of which are doing what but they said some are overfueling and some are returning fuel or underfueling. Now does this sound like its a possibility and what do you recommend I should do?

The seat keeps turning…. You need to replace every seat, chair in the shop.

Injection pump failure.

Can I get my injectors sent somewhere to get bench tested?

Lack of knowledge, lack of tools, and replacing 1 injector doesn't generate $$$. Is all about the money to be made.

i would say false.. 03 5.9 CTD with 216,000 miles on it. far past the engineered lifespan of what injectors should be used for. 1 injector started to leak down causing issues. this means the rest arnt to far behind it. could i just replace the 1 and cal it good?? sure, bet then im back in the shop in who knows how long, not to mention if its a major failure and it wont start how much a tow will cost to even get it to my shop.. as a mechanic and someone presented this i would recommend all 6 for the fact that they are consumable, they do fail, and the other 5 probably have just as much gunk in them as the one that failed. im not the drive around with a ticking time bomb type

WHAT EVER FLOATS YOUR BOAT... LAS CUSTOMER HAD TO PAY 3 TIMES TO REPLACE RANDOME INJECTORS ON A 6.0 POWERSTROKE MONTHS APART. THE 3RD TIME CUSTOMER JUST ENDED BUYING THE REMAINDER I INJECTORS AND BE DONE WITH IT... HE PAYED 2 TIMES LABOR THAT HE DIDNT HAVE TO... THATS ATOUND 850.00 HE COULD HAVE SAVED.

Here's the problem is I see it you are an old-fashioned Motorhead you're rare we should keep you in a box so you don't get dust on you. The people out there now are just Parts changers. The hard part is to find a shop that actually has somebody who doesn't read a computer and said this is the parts we have to change and they have no idea why. That's probably the reason why they change all six injectors they don't have the training to isolate each individual problem injector.