S2000 Engine Management Engine management topics, map and advice.

rev goes slightly up and holds between shifts

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Old Jan 7, 2011 | 04:09 PM
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Default rev goes slightly up and holds between shifts

I have aem ems series 2. 2000 AP1 with 5857 turbo.
during shifts i noticed that the rev would slightly go up maybe 100-200 rpms and hold for 1 second. It is definitely not my footing because I let off the gas for 1 second then disengaged the clutch and the rev would rise slightly and hold. I also noticed that during deceleration in gear, the AFR would be very rich; around 11.5-12 and sometimes even dip to the 10's. Any ideas and suggestions on how to fix this problem?
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