Truck wants to cut off when I stop

Tiny
1990FORD
  • MEMBER
  • 1990 FORD F-150
  • 192,000 MILES
Truck wants to cut off when I stop.

I have a 1990 F150 302
Wednesday, October 12th, 2011 AT 11:57 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Check for vacuum leaks and check fuel pump pressure.
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Thursday, October 13th, 2011 AT 12:17 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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Thursday, October 13th, 2011 AT 1:04 AM

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