I just took my car for a ride after getting it back. Clutch/flywheel. Now it ran good from the place to home. I am out driving around and chilling now and a few minutes ago when it goes to idle it will stay steady at 750 for a few secs then start bouncing from 250/800 or 900 ish. But it drives fine other then the idle. Now its rated for 500 torque and has a 9lb flywheel. Is it just overclutched being stock for now? That's all I can think of. But it doesn't make sense

 

I put it in for preparation for my mods and tune in a few months where I hope to be pushing mid-upper 300's to wheels.

 

I also just remembered that it did happen once in my turbo'd rsx. Where I think it may have overboosted and idle bounced. But I shut it off for a bit and it ran perfect and never did it again after. Could that be the issue since the flywheel is so light on a stock ecu

 

I just started my car. Its been running for maybe 1 or 2 minutes at idle. And no big jumping thus far. Would still like opinions please? Was I right to think overboost?

 

chances are that when the clutch was replaced the shop disconnected the battery, and the car had to re-learn its idle fuel trims.

 

I drove from a parking lot to my grocery store and it started doing it when I stopped to park. Andi drove it like a granny. So its something to do with an overclutched situation???

 

The Evos idle like that anyway. With a lighter flywheel the effect is more pronounced. Tune it.

 

That's still a few months away unfortunately. Because I want to get all my parts in first. Maybe I need to get things done quicker then I wanted. I wanted to wait until warm weather

 

hmm I think you may have jumped the gun on putting a lightweight flywheel in too soon, Jumpy idle, drive by wire throttle, lightweight flywheel, you need a tune my friend

 

no

this

no

no

no

 

Congratulations on your perfect idling stock Evo. On both my 2008 GSR and now my 2010 SE the revs jump from time to time while waiting for a stoplight. Could be the ECU adjusting to the load of the aircon compressor kicking in or such, don't know (even in winter the aircon kicks in to keep humidity in the cabin low if you have it on auto). The Cobb AP tune on the GSR helped and soon there will be an AP tune on my SE, too.

 

Thanks but who said it was stock?