Hey guys,
So I’ve made some progress. Used my vagcom and pulled codes. Found that 4 cyls were misfiring badly, pulled those plugs and all were detonated white. Replaced plugs, used dielectric grease on the plug end + in the coil for better connectivity (why not). With those plugs swapped it’s running MUCH better.
I’ve got good power up on the high end now whereas before I couldn’t go half throttle up hill without a flashing CEL. Took it out for a 300 mile trip the other day, many WOT gear changes and full pulls. Nothing I could do before without that flashing CEL.
Lower RPM 2-4k I’m getting what feels like a bad misfire, but also like a warped or unbalanced driveline of some kind. It’s hard to explain (like a rumble/misfire) but it feels more prevalent in that lower RPM range and seems to disappear as revolutions pick up higher up int he RPM band around 4,500 to redline. Plenty of power up top.
Since the plugs were detonated, they were obviously getting spark but not enough fuel. Would a weak fuel injector cause misfires like this under less demand/load at lower RPM causing misfires but smooth out under higher demand near redline with more fuel being pushed? That being said, no new codes have come up.
No CEL since clearing codes and driving for the last few days, which makes more troubleshooting difficult. I’ll re scan later today after more driving.
Any thoughts?
PS - I’ve run a few cans of seafoam through the tank and done one intake treatment over the last couple weeks.