Thread: Vibration and shudder with lots of boost

The plugs looked ok, but only pulled two of them, looked pretty clean and gap was still good. The 198K oil change was from the previous receipts, I've changed it since.

I took out the MAF and cleaned it, it didn't look to dirty - I seem some people mention there's is "fuzzy". Can't test if it helped right now, bunch of snow on the roads

That was the before, the sensor didn't look a lot cleaner afterwards, still dull gray, though the two vertical bars it connects to got a lot shinier

That really sounds like a bad axle to me. If you have enough load/torque it will shutter and feel like it's coming from the engine.

A quick follow-up, still have issues after cleaning the sensor, but I've since found the lower motor mount is destroyed - could that be causing the vibration under heavy load? Need to figure out how to strap a camera under the hood while driving to see

I have a 2000 SE 3.1. Mine would shutter taking off from a stop. As Chris said it turned out to be the coil pak. I checked the coils old school. Took a wire off 1 tower started it up no spark. Good. Took next wire off started it up spark flying all over the coil pak. Bad. Replaced them no more shutter. Did away with my random misfire code.

Originally Posted by jasonnovak

A quick follow-up, still have issues after cleaning the sensor, but I've since found the lower motor mount is destroyed - could that be causing the vibration under heavy load? Need to figure out how to strap a camera under the hood while driving to see

Oh my god, If your lower motor mount is shot, change that thing asap. Check the tranny mount too. I can't emphasize to you the problems I thought my car had before I changed a shot motor mount - night and day difference.