97 Taurus idles high - can anyone help?

[sekeberg]

Willerd and I cannot be the only one in the world who this has happened to. Someone must have an answer before it blows the transmission.

Willerd has a 98 Taurus and I have a 97 Taurus. His problem sounds like the same problem I have.

Out of nowhere my 97 Taurus will idle up to 2000 rpm in park and neutral.
It just starts happening by itself. There is no warning. The kicker is that the service engine light has never come on. Therefore no codes are stored. It has 64,000 miles on it. When it first happened was at 16,000 miles and under warranty. Ford replaced the idle air control motor. I recently replaced the IAC and it did not make any difference.

Earlier this spring I went through a car wash and it did it immediately after leaving the car wash. I thought it was a moisture problem. However, after the car wash it didn't do it again for 2 - 3 months. It just started doing it again a month and a half ago.

Can anyone help. There has got to be an answer.

[wiswind]

Throttle Position Sensor?....(TPS).
Also, Try unplugging and replugging electrical connectors.....and make sure that the wiring harness is not rubbing against something.
Those are 2 cheap and easy things that come to mind.

[pnettle89]

Did you have your EGR Valve checked/cleaned out/replaced yet and the Idle Air Control Valve (IACV)?

[sekeberg]

Originally Posted by wiswind

Throttle Position Sensor?....(TPS).
Also, Try unplugging and replugging electrical connectors.....and make sure that the wiring harness is not rubbing against something.
Those are 2 cheap and easy things that come to mind.

I haven't not tried either of these - thanks for the help.

[sekeberg]

Originally Posted by pnettle89

Did you have your EGR Valve checked/cleaned out/replaced yet and the Idle Air Control Valve (IACV)?

I have put in an IAC myself twice and the dealer did it twice. The IAC doesn't seem to be the answer even though it is the most obvious.

I may try the EGR Valve. Thanks for the advice.

[AYJAY1337]

I am having the same problem with my 98 taurus. It started after I replaced the camshaft positioning sensor. Any luck figuring out what the cause was?

[sekeberg]

Originally Posted by AYJAY1337

I am having the same problem with my 98 taurus. It started after I replaced the camshaft positioning sensor. Any luck figuring out what the cause was?

Yes, I had some luck. When it is idling high unplug the idle air control motor. If it continues to idle high then put the connector back into the IAC and then unplug the throttle position sensor(located right below the IAC). If the motor slows down then that may be the answer.

If it should idle high again try replacing the coolant temp sensor.

Anyway, mine doesn't idle high anymore.