Dmczeke
Probationary Member
- 3
- 0
- Jun 17, 2016
-
Woodland,
California
Hey guys. Just bought a 99 Spyder GS 5speed 4G64 for a father and son project. No mods yet other than drilled/slotted rotors and a couple inch drop.
Fixed a bunch of random stuff so far, but we are stumped on an engine issue. The car starts and runs great when cold, but after it's nice and warmed up (about 3 minutes), the RPMs drop way down, the car stutters, almost dies. If I leave it running, it sort of clears up after a few minutes, RPMs raise to about 1k, and I am able to rev up the motor with just a small bog/hesitation, but then it might drop way down to 300 RPM again.
There is no CEL on. It will run great with the MAF disconnected. I've been scouring the local (Norcal/Sacramento) Pick n Pulls and got some random parts. I tried another GS Spyder ECM with no change. Tried two other MAF sensors, no change. Tried another coolant temp sensor with no change. I grabbed a TPS and cam sensor, but did not try those yet.
From my web searching, I've read that maybe the IAC is bad. I couldn't find my version in the junk yards and that part is around $250-$350 at the parts houses. Is there another model car or truck that I can get that blasted IAC off of from the junkyard?
Am I going in the wrong direction? Seen some other posts about this problem, but no one has ever given a solution.
Thanks for any info or help that you guys can give.
Fixed a bunch of random stuff so far, but we are stumped on an engine issue. The car starts and runs great when cold, but after it's nice and warmed up (about 3 minutes), the RPMs drop way down, the car stutters, almost dies. If I leave it running, it sort of clears up after a few minutes, RPMs raise to about 1k, and I am able to rev up the motor with just a small bog/hesitation, but then it might drop way down to 300 RPM again.
There is no CEL on. It will run great with the MAF disconnected. I've been scouring the local (Norcal/Sacramento) Pick n Pulls and got some random parts. I tried another GS Spyder ECM with no change. Tried two other MAF sensors, no change. Tried another coolant temp sensor with no change. I grabbed a TPS and cam sensor, but did not try those yet.
From my web searching, I've read that maybe the IAC is bad. I couldn't find my version in the junk yards and that part is around $250-$350 at the parts houses. Is there another model car or truck that I can get that blasted IAC off of from the junkyard?
Am I going in the wrong direction? Seen some other posts about this problem, but no one has ever given a solution.
Thanks for any info or help that you guys can give.
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