98 Deville

1998 CADILLAC DEVILLE
115,000 MILES • V8 • FWD • AUTOMATIC
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DRDOOWAH
  • MEMBER
  • 1 POST
idle on my 98 Deville increased dramatically, won't return to normal. Temp dropped in our area prior to this problem. Advise
Dec 14, 2010 at 7:07 AM
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FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
Is there a check engine light on? Unless there is a significant vacuum leak, you could have a faulty idle air control valve, a chunk of carbon in the IAC passage, throttle plate stuck, or a faulty cruise or throttle cable.
Dec 14, 2010 at 9:22 PM
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