Welcome to the addiction. A bunch of us jumped ship (good follow up to PM's post) from the Sewing Site (NAM) several years ago. The knowledge is here. Just ask and wear your thick skin, although we are harmless!
I have a 2012 JCW coupe.Roasters are great cars I drove one before I bought my coupe. I almost bought it but when I told my wife my plans for it she said thats what had been done to the coupe. I got it from one of the members here, he did a great job modding it.
Have you tried swapping out the coil pack to see if the miss fire follows the one in Cyl. 4?I had one go bad under hard acceleration just before redline. I thought I had bent a valve. I limped home checked the compression, it turned out to be one coil pack.
That I did. Then ODB code Multiple. 1 time. And I didn’t repeat it. I paused. Decided to swap spark plugs. The plugs were sinful black so I (for giggles) hit em with a light sandpaper then put them back in. Hit start and this time I got Cylinder 2.
I just finished a compression test (10 cycles each) with an even 140 across all 4.
So I’m hoping like hell its my plugs.
Guess I could pull the coil packs, pull the fuse pump fuse, rack a plug back into the coil to see if I get spark ♂️
I was looking up on bing images of the oil filter housing exploded views. I might have unsprang the oil back valve spring or other....As i removed the old oil filter .. I came across a spring about 2 inches long. i do not know if it was logged somewhere, Or where it came from. So far had no issues with engine lights. This occurred last springtime. Does anyone think it came from the oil filter housing ?
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