This one is a bit puzzling for me. I was at a track day at VIR, I would get a check engine p1302 after going over the bumpy curbing. I checked the coil pack plugs and it seems #3 or #1 came slightly unplugged. I fixed this, reset the engine light and go back out and the car was 100% fine. Then if I hit those curbs shortly after the light one come on. I did this a few times.
The last lap out it happened again, but this time the car lost power after downshifting from 5,4,3 at the end of the big straight. I shut it off coasted in, waited 30min and it started right back up. It seemed normal so I figured I was lucky and time for new coil packs. I turned it off and loaded it up to leave.
When I inspected the coil packs, you could see arc marks on the tube section. I had applied the dielectric on the coil tube years ago. I figured it was time for new coil packs/ more grease.
I figured I haven't checked the compression in a few years. Why not check it. Now things get weird.
The engine was cold. Unplugged injectors, but forgot do full throttle.
I started at #1 and went to #2 next.
Front of engine
#4 #3 #2 #1
So I add oil to #1 and it goes to 90.
Tried again with full throttle and #1 is still at 90.
On to the leak down test with compressed air. Checkout the video.