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

High idle at startup

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Old Mar 28, 2010 | 04:40 PM
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From: vero beach florida
Default High idle at startup

When I start the car it shoots up to 12-1600 rpms and then starts dropping to normal after a couple of seconds.
does not matter if car is hot or cold.

anybody figure out what causes this problem?

IAC and TPS are working right, TPS is .55 and the IAC is set properly.
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Old Mar 28, 2010 | 04:47 PM
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I don't think you have a problem. I've never owned a LT1, but my L98's that I have had over the years have always ran higher rpm at startup and slowly dropped to normal idle.
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