1988 cadillac eldorado...when i start it the idol stays high...normally it

  • Thread starter Thread starter adk25green
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adk25green

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come down..if i ? give it a quick burst then it comes down but still not to normal.
i have the driver info center but its just saying service engine soon ...no codes
any one know ?

thanks
 
Is it cold where you are? Sounds like a common sign of a carburetor choke running high to help warm the engine. If it's not cold, then it might just be the choke sticking.
 
Is it cold where you are? Sounds like a common sign of a carburetor choke running high to help warm the engine. If it's not cold, then it might just be the choke sticking.
 
to pull the codes turn key on push off and warmer at the same time on your heater control. should flash codes. Idle could be high due to something actually holding the throttle open. vacuum leaks will push ffalse air into the engine which the computer will adjust for with more fuel. Most likely is a frozen stepper motor which controls idle speed.
 
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