Hey guys having an interesting issue with my SC 2.4l which has become more problematic since I put on my lighter flywheel. I did rebuild the engine at the same time with lower compression 9.0 vs 10.4, but I am not sure what effect that would have since it did happen periodically before the build. Issue is when I press the clutch in while coasting down or engine braking the idle overshoots and drops to ~500 rpms then recovers and idles as normal.
I noticed it does not do this if I blip the throttle at idle. It comes down and idles normally. Same thing if I am accelerating and press in the clutch to shift, but I just let the idle drop, it will not overshoot. It seems that while I am engine braking the throttle follower decays and then when I press in the clutch it overshoots. I have made adjustments to the throttle follower and it does make noticeable changes, but not for my issue.
Running MAF only with SC/60s/Alum Flywheel/Ported head/Ported LSJ TB.
Attached is a log showing the idle issue. At about 25sec I press in the clutch and it goes under 500rpm and again at around 37 sec.
Hopefully this crap makes sense. Any input is appreciated.
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Originally Posted by hhrfreek
