84 help:high idle
Thread Starter
3rd Gear
Joined: Aug 2011
Posts: 3
Likes: 0
84 help:high idle
HELP PLEASE. High idle when car starts.(11-1200 RPM) Does not throttle down. 0-25 hesitates then runs real smooth. Any suggestions on what to check?
Appreciate any one's experience with this
Thanks J
Appreciate any one's experience with this
Thanks J
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
You have a vacuum leak. Find and fix the vacuum leak and the high idle will go away, the hesitation may go away (Check your fuel pressure for that if it persists) and the engine will run better in general. Fix the vacuum leak(s)! 
Melting Slicks
Joined: Dec 2009
Posts: 2,244
Likes: 290
The 84s have an odd style coolant temp sensor that is troublesome, wiggle it to see if the idle changes.Its under the air pump, screws into the intake. You can retrofit a newer style sensor/connector if you feel its a problem. I think the 85s started using them.
Racer
Joined: Jul 2010
Posts: 261
Likes: 0
From: Spokane WA
Thread Starter
3rd Gear
Joined: Aug 2011
Posts: 3
Likes: 0
Thank you for your advice. The sensor at the front of the block driver side...I pulled the connector off while running and no change in idle....if that's the one does that indicate it is bad?
Thanks, Joe
Thanks, Joe
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Wrong coolant sensor. You just "checked" your coolant gauge sensor. The CTS for the ECM is located on the front of the intake, slightly to the passengers side.
FYI, 11-1200 RPM is normal for a cold start up on a CFI car.
FYI, 11-1200 RPM is normal for a cold start up on a CFI car.
Last edited by Tom400CFI; Aug 25, 2011 at 11:41 PM.
