The defective TPS came on my SPR throttle body. Maybe it was used/reconditioned,, it was cleaned to appear new. The injectors on the SPR performance TBI failed in one year also.

The TPS that...

Possibly solved,

Just in case someone reads this in the future i may have found the culprit. I came home the other day with the high idle, before anything else I grabbed the laptop and data...

Hello all,
The issue is back today and more consistent. When it idles high i don not have Idle/cool flag
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when it idles normal I have the Idle/cool flag.

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Any idea what this...

I dislike unsolved threads so i wanted to post, It has been a month and the truck has been running perfect and not one instance of high idle. I guess i will leave as is for now.

If I ever...

I have the $4F mask. At the time i was not confident about installing and possibly repinning a different ECU. If this continues i might try going with a different unit.

I have a CJ build i...

I just replaced the park/neutral switch again because i had no reverse lights. It wasn't that old. It has always been hooked up.

The truck is an 89 and came with the 400 turbo. It has the...

I bought a TBI from this place when I rebuilt the motor/driveline ~5 years ago.

https://www.sprperformance.com/

The injectors that came with it failed after a year. The pedal always feels...

Rick,
Thanks for the reply, Are you thinking if it had no connection/fault/short it might default to the -8C setting and through a ton of IAC?

When data logging i have never seen the temp...

Hello All,

everything On my build has been running nice but I still get a random highh IAC count can can not determine why.

1989 v2500 burb, 5.7 TBI.

The truck will idle fine @~650 RPM with...