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 use to have a similar problem as described and my problem ended up being the coil packs being needed to be replaced.


chris

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

http://imageshack.us/a/img849/2854/t9f8.th.jpg

is that before or after the maf cleaner? it looks a bit dirty. they should be sorta shinny looking.

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.

Quote:

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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 :)

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If its destroyed like you say it is, it's going to throw off the axle geometry. Just replace it and see what happens, because it's already shot.

Quote:

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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 :)

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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.