Engine Code Problem
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Joined: Aug 2007
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Engine Code Problem
I own a 1991 F250/460/Auto/105K.
Here is my problem. I am pulling engine codes for a bad TPS and EGR. I took it to a reputable service shop and they tested those parts and they were functioning correctly. They reset the computer and It pulled the same codes again after 100 miles. The Check Engine light came on once within that 100 miles for only a few miles then went off. The truck seems to run just fine except for a mild up shift in the tranny while letting off the throttle to coast. It's not slipping but a very subtle up shift before it drops into the next lower gear. The Tranny is freshly rebuilt. Any ideas??
Here is my problem. I am pulling engine codes for a bad TPS and EGR. I took it to a reputable service shop and they tested those parts and they were functioning correctly. They reset the computer and It pulled the same codes again after 100 miles. The Check Engine light came on once within that 100 miles for only a few miles then went off. The truck seems to run just fine except for a mild up shift in the tranny while letting off the throttle to coast. It's not slipping but a very subtle up shift before it drops into the next lower gear. The Tranny is freshly rebuilt. Any ideas??
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Joined: Jan 2001
Posts: 56,980
Likes: 2,735
From: Virginia
If you want to start pulling the codes yourself, here's a link to tell you how to do it and you can use a simple meter with a needle or a testlight.
http://www.fordfuelinjection.com/?p=13
http://www.fordfuelinjection.com/?p=13
