high idle
Posting Guru
Joined: Apr 2000
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From: PNW
Might be the idle air control valve (IAC). If you google "Ford IAC", "how to test IAC", etc. you should be able to find plenty of information and youtube videos. Keep in mind that the IAC is similar across other Ford models, so something you see for an F150 or Explorer would most likely apply.
Are you getting any codes?
Are you getting any codes?
Posting Guru
Joined: Feb 2001
Posts: 1,016
Likes: 1
There is a tech bulletin ford put out. I can't rememeber the number of it.
It concerns the 98-2000 rangers. High idle issues when replacing the IAC don't fix it.
Basically the connector on the TPS is jacked up and Ford recommends buying their $80 kit to fix it. The kit has a new connector which you splice into the old cable harness for the TPS.
I had the same issue every 6 months and would replace the IAC for high idle and it always came back anywhere from 3 months to 6 months. I also noticed a pattern. The high idle always seems to come about during wet or humid weather conditions.
After reading the tech bulletin I decided to clean the connector on the TPS and the connector that plugs into the TPS with electronics cleaner. While the connector was wet with the cleaner, I put the connectors together and took them apart several times to help clean the contacts/pins. I let the connector dry for a few minutes and then stuffed the connector with dielectric grease to help prevent corrosion on the pins. Put everthing back together and fixed. No idle issues anymore. After doing this your idle trim might be out of wack but drive it for a couple of days and let it relearn the idle trim. Don't bother unhooking the battery to do this. Just drive it.
It concerns the 98-2000 rangers. High idle issues when replacing the IAC don't fix it.
Basically the connector on the TPS is jacked up and Ford recommends buying their $80 kit to fix it. The kit has a new connector which you splice into the old cable harness for the TPS.
I had the same issue every 6 months and would replace the IAC for high idle and it always came back anywhere from 3 months to 6 months. I also noticed a pattern. The high idle always seems to come about during wet or humid weather conditions.
After reading the tech bulletin I decided to clean the connector on the TPS and the connector that plugs into the TPS with electronics cleaner. While the connector was wet with the cleaner, I put the connectors together and took them apart several times to help clean the contacts/pins. I let the connector dry for a few minutes and then stuffed the connector with dielectric grease to help prevent corrosion on the pins. Put everthing back together and fixed. No idle issues anymore. After doing this your idle trim might be out of wack but drive it for a couple of days and let it relearn the idle trim. Don't bother unhooking the battery to do this. Just drive it.
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