I have a 92 hatch with a built a6/z6 combo running 10psi. I have 750cc injectors and it is tuned with uberdata I noticed today that when I push the clutch in to shift gears the rpms rise by about 200-300 rpms before they go down.

My cars idle is set at 900 but sometimes it idles at like 1300 or so and other times it idles right at 900. Whether it is idling at 1300 or 900 it seems lumpy. Almost like a misfire. Could cleaning the throttle body and intake manifold solve my 2 problems? I have no vacuum leaks either.

I have read in some other posts that the big injectors are hard to get to idle. I would appreciate some feedback about what peoples cars with big injectors idles like. What it feels like and so on. Im assuming that it is supposed to idle like stock but i could be wrong. Other than that the car runs and drives fine. Thanks in advance.

 

Who tuned the car? The idle is an issue that will have to be tuned out. The rise in RPM's between shifts may be due to your driving style. Are you lifting off of the throttle before starting to disnegage the clutch?

Phil