1998 Cadillac DeVille "high idle" Questions

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Question about Cadillac DeVille

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...idle very high sometimes around 2400-3000 rpms when it does this it wants to stay at a constant speen of 50-70 mph when its doing this i have to ride the breaks... im taking a very long trip soon and ...

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...high idle 1100 to 1200 RPM with out droping. While running it will sometimes just stall while on the road, or it runs at a high idle. Now this is an issue that is becoming more an more frequent, but ...

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...high idle .The idea is to test all thing's that could cause a high idle till you find the problem. Vacuum leaks , throttle plate sticking because it's gummed up with carbon , varnish build up . Or is ...

idles high when i start my1994 cadillac deville It is supposed to have a high idle when first started this is normal automatic idle speed control strategy

...the EGR is stuck open mechanically or from carbon the idle can go high . A bad IAC or incorrect signal from the computer module can cause high idle . Vacuum leaks from intake gaskets and PCV valves

...high you most likely have a vacuum leak. Check the vacuum hoses for splits or breaks it could also be the throttle body base gasket. There should also be a idle air control valve which could be ...

Question about Cadillac DeVille

1 Answer

...High idle I have a high idle problem in between 1500-2000 kickin out a trouble code of po27 I am not sure if this will help you but PO27 is listed as "Open Throttle Signal Switch" which could mean ...

...not have to adjust your idle. itusually means that there is a bad sensor if your idle has changed suddenly,**** what exactly is the car doing? ex.fluctuating rpms?, low constant idle?, high

...& will also rev high,not idle down,when u stop. Do u think -bad ingine idle actuater ? check gaspeddel cabels on throttel body see if they are hung up pull on both outer cabels ehile running ...

Question about Cadillac DeVille

1 Answer

...HIGH OF AN IDLE The system has to be reset by the Dealer. The computer is still reading a hard code stored. or There could be a mass air flow sensor out of range. The dealer or a local shop with the ...

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