Revs Jump on clutching - Impreza

Honest John Back Room » Technical matters
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Sun 1 May 2005 18:49
Revs Jump on clutching - Impreza - Leon on Derv
I have noticed an irritating issue on my Impreza, in that when you put the clutch down to change gear the revs jump by 200RPM. It makes no difference whether I am driving normally and changing up at 2500 RPM or heading to the 'red line', watching the rev counter the needle will always jump by 200RPM before dropping revs. I have checked my driving style carefully to ensure I am coming cleanly off the accelerator and I believe I am.

A previous owner made some mods to the car, de-catted (both cats), performance exhaust (cant find lambda sensor), induction kit, VTA type dump valve.

I hope to remove all off these mods in the next two or three months putting the car back to standard. I hate induction noise and the dump valve wooooosh. Any ideas what the likely cause is. The car idles fine, and accelerates like she should. Just irritated by this little glitch and more irritated that I cant trace a cause.

Thanks,
Leon
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