Engine Revs
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Junior Member
Joined: Jan 2004
Posts: 1
Likes: 0
From: Spain
Car: Z28
Engine: 5L injection
Transmission: Automatic
Engine Revs
Can anybody help?? 
Engine revolutions at cold approximately 1500 takes approximately 7 minutes to reduce to 750 revs, this is the same when the engine is hot. Has anybody any ideas how to reduce this time when the engine is hot. The car is a 1986 z28 5L injection automatic.
Engine revolutions at cold approximately 1500 takes approximately 7 minutes to reduce to 750 revs, this is the same when the engine is hot. Has anybody any ideas how to reduce this time when the engine is hot. The car is a 1986 z28 5L injection automatic. 
Joined: Feb 2001
Posts: 13,777
Likes: 567
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Your throttle could be sticking or you could have a vacuum leak. It could also be your IAC and or TPS sensors. Many things to look at. I would check out how to data log and narrow down the problem before you start changing things.
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