1990 Ford Aerostar ENGINE REVS UP AND DOWN IV ALL SPEEDS

160,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
MIXER11
  • MEMBER
  • 1 POST
ENGINE REVS UP AND DOWN IN ALL SPEEDS LOPES WHEN IDLEING AND DIES
Sep 27, 2008 at 7:27 AM
Advertisement
Avatar
MMPRINCE4000
  • ✓Experienced Mechanic
  • 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 10, 2008 at 11:58 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle