parts cannon, sounds more like a 155 mm parts howitzer LoL. another excellent video thanks Ivan !

Omg!! I live in Ithaca! Next time you’re here, would love to take you to lunch!! You’re work is awesome!

i admire the mindset of IVAN and when i am troubleshooting i get my extra energy from him

Too bad the original parts are long gone. I'd put the old "crap" back and start over again.

I can't believe they have not replaced the ECM yet. Usually, people have put several on those on at this stage. 🤣🤣

I agree. The cat could be plugged But I’d be checking those replacement coils on those cylinders aftermarket crap. Seen to many crap out under load. Looking forward to your find!!

I watch your videos all the time and I love them . I find it all so fascinating and I've learned a lot . Thank you !

I love your "new" multi-part shows!

Ivan, looks like you've found another one. Can't wait to see how this turns out. Thanks for Sharing!

What ever you charge for your service is likely not enough. Love the channel!

I love Johnny Hates Jazz - shattered dreams! Great case study anxious for part 2

Your approach to every single car is absolutely awesome. Thanks 👍 for sharing your knowledge us Part 2 bring it on!!!

Great study! Cant wait for Part 2!

Sitting here thinking selfishly, I wish he was my neighbor

waiting for part 2 Ivan! Have a Happy New Year!

your skills amazes me as you have big headaches that you work through patiently!!

Looking forward to part 2!!

Thanks Ivan, absolutely a great case study!

Detective Ivan is on the scene I have a feeling you will find the culprit(s). Thanks Ivan and have a Happy New Year.

Great vids Ivan. Have a happy New Year.

It's like house, but for cars. Magnificent!

Looking forward to part 2 !

Very interesting. Thanks Ivan!

I watch this channel to learn more about how to keep my 21 year old van on the road, but the big bonus in this channel is getting to see scenes from my much beloved and missed home state. Thanks for that. It made my day.

A lot of bad parts are being distributed to Auto Parts Stores. This is what a lot of us are dealing with. I just say a small prayer now hoping that my replacement (Non Factory) part will endure past the Warranty period. I just replaced the coils and spark plugs in a 4.6L Ford motor last month and the customer said the vehicle was running rough. I diagnosed the #7 coil as bad and replaced it. Ran fine. The coil was at fault with less than 2,000 miles on it. This is not the first one either. A 4.6L cannot handle a single cylinder misfire to well at all. I explain to customers that if you go cheap you can pay in the long run. Some listen Some don't.

Can't wait for part 2 to find out the issue.

Ivan, you are amazing. As meticulous as you are, I hope you produce a digital record of your findings for purchase. This would be a very valuable tool for every mechanic in the country, world.

Another interesting issue! Ivan, I can't wait to see if your gut feeling is correct. Thanks for posting it.

Your videos have better cliffhangers than most drama programmes.

Quite an interesting case study Ivan!, can't wait to see the next part/s of the diagnosis. Throwing parts at the vehicle indeed throws off the diagnosis and starting from scratch is really the way to go. My bet is on a clogged portion of the exhaust system.. Cheers!

Do any of these people who get ripped off by shop's who just throw parts, and don't diagnose the problem ever get their money back??? I fix all my own vehicle's, because I don't trust anyone to do an oil change right. My dad passed away last year, and I ended up with his truck. I went to do an oil change, and they were to lazy to put the right filter on, and put a smaller filter on. I have an 05 ranger with the 3.0, and the filter isn't that easy to get to, and it has this funnel to keep the oil from dripping onto the starter. The truck had left a leak spot only after driving, so i figured it was the filter, which was not even close to hand tight. I had a guy flag me down from an oil change place, and he showed me his dipstick that had no oil on it, and he was protesting the guy because the drain plug fell out, and locked his motor up, and he had it towed to the lube shop to make them take care of it, but they had already closed for the day. The guy went down the road with his phone, recording all the oil leaking it did. I have known two other people with the plug falling out. Part cannon city, along with junk parts from china, and then your car is still broke, crazy. Thanks for all the great content. God bless.

What a joke, 7 shops. man we need to get this auto industry together.

Great video 👍

Instead of a possible plugged cat, I wonder if there was cast flashing in those brand new looking headers that could be plugging up the Exhaust??? Looking forward to part 2 Ivan!!!!!

The difference between a technician vs a mechanic is the parts cannon vs diagnostic tools and diagnostic mindset.

when it comes to Computer diagnostics you and Scanner Danner at Rosedale are my go to guys.

Listen to that piston slap😂😂 Raaaa.....Raaaaaa

Thank you Iven I was wondering why when I revved the engine to 6500 the missfire cleared up

Love that Cowboys towel. Ivan will find and fix that problem, no doubt

Ivan building up the hype on this case

Thank you Ivan

I repaired a NY Corvette many years ago with similar symptoms, by cleaning the corrosion off the ECM connector.

I'm really waiting for part two .. it's almost like a soap opera lol I'm going with a crook cat ..

Where do the professionals turn to when they are stumped, IVAN at PHAD!!!

I wouldn't bet on a new cat being restricted, but a muffler restriction may have been overlooked. Good to get back pressure out of the way though.

My money is on one original problem compounded by at least one new problem introduced by the parts cannon.

How could you leave us like that? I can't stand the suspense!

Go get 'em Ivan !!!

Ivan, always good stuff, thanks, but see that Cowboys blanket behind you? Get rid of that thing! That's the problem!! lol 😎 HNY

I would say you have several issues going on. Just the fact that the one O2 sensor is almost touching the frame tells me that it's the wrong one or definitely aftermarket if the exhaust pipe is original and in the original position. With the misfiring and the rich condition, the new cats could already be bad depending on how long it's been driven with those symptoms going on after the cat replacement. I can't wait to see part 2.

Hey Ivan, it's been a while, but I seem to remember that this year had two different up stream sensors. One was Delphi and I think the other was Denso(?) Not sure. I never had both in hand but if the sensor you showed is too long (touching the frame) it could be the wrong one. Also, the ground for those sensors is one of the upper bell housing bolts. We have had a couple of these in my classroom that my students diagnosed O2 issues on over the years.

This a good one. I would like to see the coil power, ground and signal on the scope. If I had to guess, I would say a PCM ground issue. You'll find it.

HI IVAN ,looks like another great video.The videos lately have been great,all these people with so many different problems that have been looked at by many many mechanics.i think a small part of the issue is if they had them at the dealer or a high volume repair shop the pressure on rookie mechanics to fix or find something wrong so they can bill hours to the job is just to big.So they SHOOT THE PARTS CANON,in this case it's more like a gatilling gun.AND then send it,saying if it screws up bring it back.It also could be that they GOT the right part,that was the issue but USED A LOW QUALITY replacement that didn't meet the specs THE CAR Needed to run well.You are #1 as far as I'm concerned on TEACHING how to diagnose an issue and confirm that the part is the CORRECT part, once the repair is done.I hope you consider a TEACHING career once you get TIRED of actual repair.your knowledge and ability to diagnose should be passed down to STUDENTS.So thanks

Hi Pine Hollow. 97 grand voyager 3.3 crank, no start, no spark. Fuel pressure perfect. All fuses good. Replaced cam and crank sensors. Then noticed ASD relay has no power on the circuit when key on engine off.

Great video how does fueled oil affect fuel trims?

Have a 4.8 2000 silverado doing the same type thing. So looking forward for clues. Haven’t parts cannonball it yet😅

What are the odds that all the after market parts are working? Bought the headlamp from your store as a little thank you gift for some friends and all are appreciative. Stay well

Dang, you left us hanging!

Good video ! I would go for one area at a time exhaust then fuel then ignition that way you can eliminate possibly of bad aftermarket parts . I am taking a stab at first bad aftermart part or parts then a crack intake manifold

Unfortunately "Getting money back" from a slew of blunders is worse than dealing with your insurance company after a accident. Especially now adays considering the world we live in

When the parts cannon doesn't fix it, the diagnostic mindset will.

Scanners help so much

Make sure you post them all 😎

And, like Heinz ketchup, anticipation is making me wait.

The suspense is killing me

Those motors are a pain to diagnose… the few I’ve had to mess with had about a dozen small issues, lots of vacuum leaks and on and on and on… never ending…

Why is there never any ice cream in Ivan’s videos? This was definitely a double cone triple scooper.

Can't wait to see how this turns out...my initial thought was that if a whole bank is bad it could be a bad cat if each bank has their own. Geez, maybe I'm actually learning something watching all of these repair vids ;)

I think they loaded up the blunderbuss with all the parts they could find and shot it.

Can't wait to see what happens with the O2 that's mashed into the frame rail. Learned values?

You know a video is good when a 17 min video feels like 5min 🤣

Many times I was the last tech that they called .there is nothing quite like following a string of parts changers . Diagnosis by replacement pays well one time but leaves a bad taste in the customers mouth .

Wow, so many shops had a stab at it lol. (I think they need to do a course on engine management logic). Who could supply that 😀. So in open loop mode the computer is using default settings that are close enough to allow it to run?. The second it has sensors, logic hell breaks loose lol, plus any vaccume leaks/breaches could confuse matters.

Hey Ivan. The O2 sensors were reading lower than bias (except for one I think I saw) because the heaters turn on KOEO which drops the voltage. It is a test that you can use to check for heater operation.

Are all your customers called Don?😜 The golf cart guy was called Don too I think 😂

Im bettin its melted cats I would not count out a bad upstream o2 on bank 1 either..Running rich like that and burning all the loaded fuel built up is not good on cats. Im only a few months in on learning all this stuff thoo. I dont know if there is a down stream cat plugged and contaminating bank 2 or is that even possible? I just finished chapter one of danners classes. There is a lot to this stuff to learn. I learned a little the day you were here thoo. Thanks Ivan.

This should be VERY interesting.

I think someone left the choke on.

Why aren’t O2 sensors switching when in closed loop? Does the truck never go to closed loop? That exhaust is suspect too, especially mashing the O2 sensor wires against the frame.

Hey Ivan, thanks for that video mate, you are the boss !! hmmm ... that is goin to be a good test for the pressure transducer :) P.S a friend of mine saw my PHAD pressure transducer and got in love with it ... hehehe Do you have any ready to ship ??

What about the bad ground, do we know where that is and about any related sensor circuits connected to it?

I had one with similar symptoms that had a leaking fuel pressure regulator.

I used to work at a used car yard, higher cylinder pressures require higher ignition voltage to jump the spark plug gap, which a fowled plug would undermine. Change the plugs. If you load the engine just below the point of misfiring, you can get the plugs to clean themselves up sometimes A blocked cat subdues the exhaust note, the exhaust note sounded pretty throaty in the garage

In my great uncles stepdaughters Ford EL Falcon it had a problem with the ground wire causing that sort of problem because the fuel injectors & the ignition coil is grounded through the wire which had a corrosion problem,it wasn't firing properly on cylinder number 6 & the spark plug was a bit wet. It's possible that the PCM in the car in the video has a short circuit or a partial short circuit in the ignition coil signal circuit or fuel injector driver circuit,a possible cause is water inside the PCM,I have had that problem before. It could be something a simple as a corroded terminal in a wiring connector or in the PCMs wiring harness or the wiring harness could be chafing on the chassis ground somewhere therefore causing it to short to ground, check the loom visually to see if it has been melted through by the exhaust headers, etc,I've had to do some wiring loom work on a 1991 model Toyota SV21 .Camry which had an overheated but not seized engine in it,some of the wires melted.together & shorted out inside of the loom. If it runs a return style of fuel system then there may be a blockage in the return side of the fuel system, it's a possibility that could be causing the "pig" rich condition as well

12.30.21. You put it best when you said constipation®️😵‍💫

O2 sensors wiring I 'd also check secondary ignition

Strong smell of gas suggests that O2 sensors are not incorrect/defective and exhaust really is that rich. Cat on Bank 1 could be compromised as a result. So that may need to be replaced, depending on results of pressure testing. But why is exhaust rich? Insufficient spark? Test those aftermarket ignition coils. Looking forward to part 2.

Check the intake-has a baffle broken between the air filter and throttle body preventing air from getting in?

I'm going with bad O2 sensors. It looks like they are hitting the frame, which has possibly worn through the wiring harness coming out of the sensors

Would be interesting to know how much that customer had to pay up till now and how this all started out. Was it something that all of a sudden happened etc ... .

Right off the bat I believe we have upstream o2 sensor issues. Ive never seen them flatline that long. Usually they will start cycling up and down .2v up to .8v ..

Intake manifold leak would cause functioning sensor to increase flow to injector to avoid lean condition?

@1:39-1:41 An ode’ to Eric O. 😉✌🏻

Since I dont have a pressure transducer, my next step would be to move the plugs and see if fouling followed them before I declared them to not be fouling as, I would want to rule them out completely as participating in the issues. As you describe the problem I am leaning to the notion that a rich mixture has crapped the aftermarket cats especially the right side, however you have not really explained how many miles or hours this truck might have been driving. lacking a transducer, and assuming there is no crossover I would look for a spot in the cam where all exhaust valves on bank 1 are closed and i would dump 100 PSI of compressed air into the Bank 1 pipe at the sensor hole and I would measure pressure using a screw in gauge at the back sensor hole. If there is a crossover, a simple sawzall cut followed by inserting a hunk of 18 ga sheetmetal would separate the two sides. If this "test" revealed no sever lag in delivering pressure through thc cat, I would move on to looking at the remainder of the exhaust. In the end I think you are going to return to that sensor that was touching the frame to solve your sensor voltage issue? .

hows the fuel pressure? i had a one of those at 100psi at idle. too high, fuel pump was bad

I shouldn’t have started pt 1. Not the cats. Just my feeling. Now I have to wait for pt 2

Its worth fixing these old trucks because they last forever unlike these newer ones that barely make it thru the warranty period. I love CHEVY and GMC trucks and vans.

This issue sounds alot like when Bank 1 Sensor 1 wire was shorted on our 6.0L, something chewed the wires. It caused the computer to go crazy, misfires and few other issues. I wonder if the O2 sensors and the coils share common source within the ECM.

Do you travel to Illinois?

Stuffed EGR have they got one or semi blocked catalytic exhaust have they checked