View Full Version : 600 rpm in neutral then 1400 rpm.

Bob B
07-18-2011, 10:07 AM
When I start the engine, it runs at 600 rpm in neutral. I shift into fwd. and bring it back to neutral, rpm is 1400. This happens when Perfect Pass is on or off.
Is it connected to Perfect Pass or another problem?
Thanks for any help.
Bob B

2002 Prostar 197
5.7L TBI—350 CID Digital Pro –Perfect Pass

07-18-2011, 10:25 AM
I would look at all pp components around the engine area. Make sure the linkages do not get into a bind the servo is working right etc.

May be the ECM but eliminate all of the pp first.

Bob B
07-18-2011, 10:49 AM
Thank, will check.

07-18-2011, 10:58 AM
I'd look at your IAC (idle air control motor) and clean it.