I took my timing belt cam shaft, valve cover and head off of my 924s to find out that I have a bent valve and leaking gasket. I brought my head and cam to a machinist to clean it up put in a new valve ...
I did a compression test and found that cylinder 4 has no compression while the other cylinders have 150psi. Do you think it could be a stuck lifter or broken spring?
Car has been sitting for 5 years and has no low end power and very poor throttle response. Also has a rough idle and car shakes between 1500rmp and 3000rpm during acceleration then smothes out at high ...