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I can't figure out what is causing my Z to idle at 1500-1700 rmp's. I tried to spray water, even carb cleaner on the hoses to see if my vacume hoses are leaking, I can't seem to find anything, what else can I do....
 

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Check to see if your air regulator is sticking. It is closed when the vehicle is cold and opens as it warms. If it is stuck closed, it'll cause a high idle. Also check the temp sensor that sends to the ECU. Gunked up connections can give faulty info and make the car run out of wack.
 

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Your BCDD valve,diapham has a vaccum leak. It is located below your intake manifod. You need to plug it off and your idle well go back down. Ken
 
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