C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Hanging idel

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Old Aug 20, 2011 | 10:52 AM
  #1  
Marv02's Avatar
Marv02
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Burning Brakes
 
Joined: Feb 2010
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From: California City Ca
Default Hanging idel

The motor runs great but the Idel has always done this even when the car was stock.

When comming to a stop or getting off the gas to Idel hangs about 1000 to 1200 RPM's for a minute or 2 before drops down to the set idel of 750 RPM is this normal.

I set the base idel when motor hot set the TPS, reset the ACV, and timming each time it works out great but when drive the car the idel still hangs.


Anyone know why and how to fix this.
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Old Aug 21, 2011 | 04:50 AM
  #2  
Cliff Harris's Avatar
Cliff Harris
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Joined: Apr 2002
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From: Anaheim CA
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Try disconnecting the cruise control cable and see if that helps. Mine was sticky and it took a little lube to free it up.
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Old Aug 21, 2011 | 04:20 PM
  #3  
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HlhnEast
Safety Car
 
Joined: Nov 2008
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From: Jacksonville FL
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I will be watching this as I have the same basic problem. When I recently asked about this it was suggested that I get a scanner and check the IAC counts. I havent done this as yet but IIRC the specs are in the FSM.
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