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1989 Ford E-Series Van idle rising up to max RPM

Tiny
RICBELLEY
  • MEMBER
  • 1989 FORD E-SERIES VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I just replaced the Idle control valve because the idle would rise suddenly and stay up.
The replacement did not fix the problem.
After the engine has fully warmed up, it will start racing up uncontrolably. Only way to bring it back to normal is to shut down and start again but it only lasts for a few minutes before it goes up to the roof again.
Can the EGR valve cause this kind of problem?
What would be the first parts to test?

Thanks for your help.

I will gladly pay up to 25.00 for a sound advice.
I will pay after I get a chance to test your recommended solution.
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Friday, June 25th, 2010 AT 12:10 PM

1 Reply

Tiny
RICBELLEY
  • MEMBER
  • 4 POSTS
I will answer to my own question so that others might benefit from the info.
It was a bad Throttle position sensor. The TPS is attached to the Throttle body at the bottom section. To remove and replace, you must remove the throttle body first.
Richard
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Tuesday, January 18th, 2011 AT 2:56 PM

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