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Revs A Little High When Clutching In Before Slow Drop

SargeRX8

By SargeRX8,
in General Maintenance

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SargeRX8 Grand Master

SargeRX8

Posted
Posted

Hey all,

Just got my car back from Unigroup after it was tuned. Noticed now that when its cold, if I drive in first then clutch in to go to second, the car will hold revs at nearly 1.5k before eventually dropping back down. It makes for uncomfortable driving and shifting between gears.

Now I understand when the car is cold that it runs in different modes hence the rpm being higher, but when the car is warm it sometimes presents the same issue. The car was pre tune tested for leaks and other issues, timing set etc. I suspect it might be something to do with the afm but at the same time, I have no idea. The AAC thing has been removed and cleaned about 2 years ago.

Idle is set to 750 - 850 rpm if I recall. ECU is a power FC.

Also have another annoying issue. When starting the car, the hand check engine light will flash and display a knock reading usually between 40 - 60 on startup. I have narrowed this issue down previously and it seems if I have the datalogit connected to my car OR if I have my narrowband feeding a signal to the ECU, it does this. Without either, the car will NOT flash and there is no ping on startup. I don't care about it but its annoying for someone with OCD with everything running right.

Any ideas guys?

dontyellpl0x Mentor

dontyellpl0x

Posted
Posted

I know with my tune and my PFC cold idle is really high as well. Makes it harder to drive but doesn't last long.

My tps was also out and would make the car idle high and hunt. Could be worth checking the tps sensor, very easy with the PFC hand controller.

Can't help with the check engine sorry!

SargeRX8 Grand Master

SargeRX8

Posted
  • Author
Posted

I've checked all sensors and the voltage are in spec. I'll be taking the car back to Unigroup to have the tune finalized after my fuel system us up to scratch.

Do you happen to have the O2 sensor connected?

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Sounds like your fuel cut recovery point might be on the high side causing it to do that.

Since you're taking it back to unigroup let them fix it, if not I'll give you a few pointers on what to do to try and fix your issue

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