What can cause it to idle high?

Tiny
ANONYMOUS
  • 1989 DODGE VAN
  • 89,000 MILES

What can cause it to idle high?

Saturday, December 15th, 2012 AT 9:39 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,362 POSTS

Check for vacuum leaks and check the idle air control valve (IAC)

Please consider a donation to help us answer more questions.
Was this
answer
helpful?
Yes
No
Saturday, December 15th, 2012 AT 9:46 PM
Tiny
CARADIODOC
  • EXPERT
  • 26,831 POSTS

Usually a vacuum leak. Check for loose, broken, or cracked hoses. Try pinching off the large main vacuum hoses. If the idle speed slows down, pinch off or unplug and block the smaller branch hoses until you narrow it down.

Please consider a donation to help us answer more questions.
Was this
answer
helpful?
Yes
No
Saturday, December 15th, 2012 AT 9:48 PM

Please login or register to post a reply.

Related Engine Idle High Questions

Help us by donating