Quote:
Originally Posted by chelito92105
Thanks for all the replies. I will be taking the cat off this weekend and checking the cylinders and hopefully running some compression tests to pinpoint the exact problem. I'll update this as soon as I get the inspection done.
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UPDATE:
While driving to and from work my SES light actually just turned off by itself and the car ran fine. However, I still checked everything.
I looked into the cylinders and did not see any coolant. The cylinders did however look black. Like a charred style but not thick or anything (this worried me a lot!) So I took the cat off and it is still in one piece. No metal pieces in it no nothing etc which makes sense since my oil level is constant.
Did a compression test and got 175 on cylinders 1-3 and 180 on #4. After putting the cat back on the car turned on fine. Left it off for a couple hours. Restarted it then the shuddering started again and this time it didn't go away. The SES light continued to flash (multiple cylinder misfire) and it then gave me an SES code P0302 (cylinder #2 misfire again).
Purchased some new NGK spark plugs, replaced them, and still the shuddering continued.
So in Summary:
Checked butterfly screws-all are still in place
Oil level constant, Pre-cat still in once piece, no coolant in cylinders.
Replaced spark plugs.
P0302 continues! Leading to car shaking like its about to turn off but dosen't.
Are cylinder heads supposed to be shiny? Someone suggested running some C-foam?
Any new ideas? All are welcome!
