924Board.org

DominicT · Joined: 15 Oct 2007 Posts: 3 Location: St. Paul

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 higher rpm. I have replaced plugs, air filter and changed the oil twice. What else should I do?

Paul · Posted: Tue Oct 16, 2007 9:24 am Post subject:

Don't start it again until you have checked the balance shaft belt and the camshaft belt.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

DominicT · Joined: 15 Oct 2007 Posts: 3 Location: St. Paul

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?

Paul · Posted: Tue Oct 16, 2007 11:28 am Post subject:

Blown head gasket, burned valve, or holed piston are the most likely issues. It could be corroded and stuck rings, but in this case, some compression is usually present.

Do a blow down check to determine which one it is.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.