Bank 2 misfires with exhaust cam codes
Greetings Tech's, This Buick has severe misfires on all cylinders in bank 2 along with these Exhaust Cam correlation codes. I have not yet been able to scope the crank/cam correlations of which I intend to when getting back to the vehicle. Being a Mobile Tech I don't have a shop, and rely on the customers availability as well as my own, and I warned the owner that he should not drive it as it will more than likely melt the cat's!… but of course being his only vehicle and needing to work….
I will include a couple of pictures from my scan tool tests with some questions I have a bit later when time permits!
Anyway, I REALLY appreciate any direction for what to look for besides the scoping when I can see it again!!
Probably needs timing chain and phasers, check for sludge.. If sludge recommend engine..
I'm not trying to be rude here but this 3.6L engine is junk and known for timing issues. I would highly recommend a complete timing job with OEM parts.
Mine as well throw on 2 cats, a purge valve, a tcm, torque converter and a power steering pump wile your there
Understood Sir, that's probably what I was suspecting after reading more of the diagnostic procedures and troubleshooting these errors. I do want to see if I can get in there and do scope testing if it's not too time consuming and see what it shows. But good to know about these motors!
GM had a special policy on the timing chains and gears of this engine. GM repaired our 2010 Traverse…..maybe 8 years ago. Did this vehicle ever have the job done? Surely it would be outside the window of the special policy by now. Lot's on Google about 3.6 timing chains. Not something your going to able to do in the driveway.
Bi Direction graph the Camshaft Variance PID will show if Bank 2 is out +/- 5 degrees setting timing chain codes
Timing chains are very common on these. Another reply mentioned checking for sludge. This is an absolute. No guarantees until the front valve cover is removed and you can get a good look inside. I also agree, replace all the actuators, guides, and tensioners. It is too much work to do over just to save a few hundred dollars on parts.
Doug; Good afternoon Sir, i hope all is well. Attached is an article written around GM's 3.6 Liter in a 2008 Saturn Aura. This article includes Crankshaft Camshaft Waveforms along with a bunch on Variable Camshaft Testing techniques. I hope this helps.
I believe there is a tsb for reluctor ring on crank shaft shifting throw a crankshaft in also why not while we are guessing
This will likely need chains, phasers, guides. If it's sludged, it will need a motor, since it will constantly cause issues with those components. These truly were a garbage motor.
Doug, As everyone says, these are known for timing chain stretch. Rarely will I see one make it past 120k without this failure. A very few have the reluctor on the crankshaft shift. There is another clue that tells us it is out of time, P0089. When the cam is out of time, the computer is unable to control the high pressure pump correctly. The computer opens and closes a valve in the pump to…
Hey Doug what did you find could you post a fix/resolution please?
Greetings, sorry about the long delay, customer hasn't gotten back to me untill recently and as far as I know is still driving the car. I mentioned to him that that job is more than I want to tackle because of the timing chains. He said he has 19 more payments on the car… I feel sorry for him! Thank you for all your replies and sorry again for the long delay.