1999 Cadillac Deville high idleing

1999 CADILLAC DEVILLE
127,000 MILES • V8 • FWD • AUTOMATIC
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JULIANROBYN
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  • 1 POST
my car idles extremely high. arround 3000 rpm and some times go down then up again
Mar 28, 2010 at 8:34 PM
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RASMATAZ
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  • 75,992 POSTS
Clean out the idle air control valve and see what happens.
Mar 28, 2010 at 8:49 PM
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JULIANROBYN
  • MEMBER
  • 1 POST
i replaced it along with the mas airflow and the tps
Mar 28, 2010 at 9:11 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Check for vacuum leaks and also the fuel pressure
Mar 29, 2010 at 5:34 AM