4l80e swap stuck in 2nd

[Wasted Income]

Oops... slip of the mind... I meant to say: "If you do not..."

http://forum.efilive.com/showthread....9515#post59515

[joecar]

I pm'd Tech Support [if you haven't already].

[old mechanic]

Help!! My check engine light comes on and the truck goes into limp mode. When I checked for error codes I go nothing at the mechanic with his scanner. I used the jumper to get the code manually and got nothing. I replaced the IAC sensor but it didn't fix it. the check engine light still comes on and by the way, the truck runs rich (6MPG). One more comment/observation: When I jumper the diagnostic block to read the error code, I hear some clicking noise behind the light once I turn the ignition to the "on" position. Once the "clicking" noise stops, the light blinks out code "12" which is a precursor to the error code. No error code are sent. at this point, the jumper is removed and the truck start fine and the check engine light stay off for a day or so and then it comes back on and the story repeats.

I would appreciate any suggestions/solutions.

Regards!

[GMPX]

Sorry, but I think a 1992 GMC 2500 is a little bit to early for most of the users on here to have any magic solution.

Cheers,
Ross

[hquick]

Help!! My check engine light comes on and the truck goes into limp mode. When I checked for error codes I go nothing at the mechanic with his scanner. I used the jumper to get the code manually and got nothing. I replaced the IAC sensor but it didn't fix it. the check engine light still comes on and by the way, the truck runs rich (6MPG). One more comment/observation: When I jumper the diagnostic block to read the error code, I hear some clicking noise behind the light once I turn the ignition to the "on" position. Once the "clicking" noise stops, the light blinks out code "12" which is a precursor to the error code. No error code are sent. at this point, the jumper is removed and the truck start fine and the check engine light stay off for a day or so and then it comes back on and the story repeats.

I would appreciate any suggestions/solutions.

Regards!

Try posting this on one of the truck forums such as:
http://www.pacificp.com/forum/index....212d921199c46e

http://www.performancetrucks.net/for...play.php?f=106

http://www.fullsizechevy.com/forums/

http://www.gmfullsize.com/forum/