Question about 2004 Cadillac Deville
My cadillac started out dying unless i held my foot on the gas when coming to a stop. now it idles too high one day and too low the next.
Posted by Anonymous on
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Posted on Jan 02, 2017
I am not sure if this will help you but PO27 is listed as "Open Throttle Signal Switch" which could mean that your throttle position sensor needs replacing. Although with Cadillacs, it could mean anything. I hope this helps...
Posted on Feb 03, 2009
sounds like the ISC ( idle speed control ) motor is being told by the computer to extend or else its possibly binding. Located on the drivers side of the throttle body . Also check for binding aceelerator linkage. One other thing that might sound strange is check the floor mat by the gas pedal. Sometimes gets jammed.
Posted on Mar 29, 2009
EIther the IAC or throttle postion sensor is dirty or faulty. Or leaky vacuum hose somewhere. As long as it is not missing and running weird, then you may have bad coil packs.
You can go to autozone.com and register for free online repair manual for your vehicles if you need it.
Posted on Jan 06, 2010
Testimonial: "very helpful!!"
Is your check engine light on while your driving? If it is get a hold of a scran tool to find out what codes are showing.Or most auto parts supply stores have one end will check it for codes, Most of them don,t charge to check it out for you.
Posted on Oct 26, 2012
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