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Old 10-21-2008, 06:13   #1 (permalink)
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Poor family needs help on 1990 5.0 wagon

I am helping a family with their 1990 Ford Country Squire wagon (that was donated to them).

Engine: 5.0 F.I.

The car sat for about 6 years and was started only once a year.

I have done the following:

- new fuel pump and strainer
- new water temp sensor
- new water temp switch
- new coil, distr. cap and rotor

PROBLEM: the car has a super fast idle and sometimes slows down when engine light comes on.

Codes set:

23, 34, 91,63,34

Took the following parts to Autozone and all tested good:
- idle air
- map
- egr
- throttle (tps)

I unplugged the positive batt term to reset the codes.

I started it up and it died, repeated the process several times until it stayed running and then it established this super fast idle.


I am stumped. This family needs a good car and I need to get it running.

The car is in great shape and does run smooth, just too fast!


I appreciate any and all help.
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Old 10-21-2008, 09:36   #2 (permalink)
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Re: Poor family needs help on 1990 5.0 wagon

Throttle cable sticking??? or Throttle body need cleaning?? (Use the proper cleaner or you can damage the walls of the throttle body)
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Old 10-21-2008, 11:01   #3 (permalink)
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Re: Poor family needs help on 1990 5.0 wagon

The cable seems fine.

I start the car, without touching the gas pedal and it runs for a bit then dies. About the 3rd start and the car assumes a very fast idle.

Not sure why the car thinks it needs to idle so fast.
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Old 10-30-2008, 18:02   #4 (permalink)
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Re: Poor family needs help on 1990 5.0 wagon - fixed

Problem fixed. The thottle position sensor was the part that caused the problem. Installed a new one and all is good. -Praise the Lord !!!

That old wagon had me beat! :)
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