06-30-2023, 01:46 AM
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#4
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Registered User
Join Date: Dec 2015
Location: Midland Texas
Posts: 12
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Re: 1988 R20 TBI High Idle?
Quote:
Originally Posted by chris989
Casey,
I know this is old and your post is a month ago,,,
Anywhoo,,, I chased a random high issue in my 5.7 tbi forever. I can data log and everything was alway in spec and then while driving it would idle crazy high until i turned the key off and restarted.
It turned out to be a defective TPS sensor. In the garage,, testing voltage it was always good. Even driving it would data log good. I finally caught it one day at a redlight. The TPS value spiked/jumped around and then went back to normal but when it failed for that few seconds it jacked up the computer without throughing a code.
Anyway, new TPS,, no more problem... I plagued me for years.
Need more help just ask,,, I will reply,
Chris
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Copy. I appreciate it. I have been chasing an idle gremlin for a while…
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