1990 Ford Aerostar ENGINE REVS UP AND DOWN IV ALL SPEEDS
1990 FORD AEROSTAR
160,000 MILES • 6 CYL • 2WD • AUTOMATIC
MIXER11
MEMBER
1 POST
FOLLOW
ENGINE REVS UP AND DOWN IN ALL SPEEDS LOPES WHEN IDLEING AND DIES
Sep 27, 2008 at 2:27 PM
Advertisement
MMPRINCE4000
CAR REPAIR CONTRIBUTOR
8,548 POSTS
Remove and clean the Idle Air Control Valve, the pintle on the valve and the base.
I would also check for any vacuum leaks.
I would also check the fuel pressure witha mechanical gauge and change fuel filter, if it has been longer than 1 year.
Nov 11, 2008 at 7:58 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.