Question about 1990 Ford F150
Unplug the idle air control valve and see if this returns idle to normal.If it does then concern is either the valve is stuck(sometimes you can just tap it with a hammer and un-stick it) or the computer is commanding it for some reason.If the latter is the case you may be able to correct it by doing a keep alive memory reset,unhook battery for about 30 minutes.If unplugging it does not cure it then you have a bad vacuum leak or a stuck throttle or linkage.
Posted on Mar 11, 2009
Replace t p s common to fail and caus this consern ase master tech
Posted on May 16, 2009
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 03, 2010 | 2007 Chevrolet Avalanche LTZ
Oct 27, 2009 | 2002 GMC Sierra
Jun 29, 2009 | 1989 Chevrolet C/K 2500
Jun 29, 2009 | 2003 Chevrolet Malibu
Jun 07, 2009 | 1997 Chevrolet K1500
196 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: