Looking for some experienced feedback. I was unable to source an exact known good waveform but found one for a 97 GTI with a AAA engine, which I believe is nearly identical to the AES engine on this Eurovan. I scoped the cam and crank on this Eurovan and I can see that its off by one tick when comparing to the known good. Measuring it out seems to be about 4.5 degrees, it does not look to be much. Would I be expecting to see a stretched chain, worn guide or weak tensioner with this amount of offset?
Looks pretty good to me, but I don't have a known good of that exact engine. I do have a 24v later model Eurovan cam/crank in the resources though. "Usually" VW is pretty good at setting cam/crank faults if it's off enough.
Thanks for the input Hans, when comparing to 'known good' it does show that it is is off slightly from what I can measure. Unfortunately I am unable to use the search feature with a basic subscription, although I've found references for the 24v but it looks to be different from the 12v. The code returns with a good CMP signal. My next course of action will be to check physical cam timing, we'll…
Does the 97 have a distributor? or is that a coil pack? Checking the timing is definitely a BIG job as the intake needs to come off to get the calve cover off. Then there is a plate that slides in the cams. Any noise when starting? I've had them make a lot of noise, need chains and tensioners, but not set any faults. What are your symptoms, other than the fault that returns?