2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Cold Start Question

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Old Jun 28, 2008 | 09:46 PM
  #1  
cfsfc's Avatar
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Cfsfc
 
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From: The Bay Area
Cold Start Question

I know the normal cold start in the engine is supposed to go to 3000rpms but mine goes up to 4000rpms. This worries me. Is this a problem and if so how can i fix it?
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Old Jun 28, 2008 | 10:09 PM
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Jpk3200
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From: San Antonio, TX
Where does it drop to after the initial 4k?
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Old Jun 29, 2008 | 10:27 AM
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Aaron Cake's Avatar
Engine, Not Motor
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From: London, Ontario, Canada
Don't worry about it.

You may have an additional vacuum leak though.

As long as it flies to 4K, then drops to about 1500, then falls to 750 as the engine warms up, then everything is working as it should.
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Old Jun 30, 2008 | 07:55 PM
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Cfsfc
 
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From: The Bay Area
it falls to about 15k like aaron says but ill check for a vacuum leak too. thanks guys
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Old Jul 16, 2008 | 04:59 PM
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From: hayward ca
im sorry for the thread jacking but i just have some questions.

so yea, my car used to do the 3000 rpm cold start for like 30 seconds. but it doesnt do it anymore. do i have to replace anything? or wat can i do to fix it?
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Old Jul 18, 2008 | 04:19 PM
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Aaron Cake's Avatar
Engine, Not Motor
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From: London, Ontario, Canada
There is a thermal switch on the bottom drivers side of the rad. It has failed closed or become unplugged and shorted.
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