Re: 94 Chevy 6.5 diesel stuck on high idle

Posted by bison on April 25, 2015 at 22:22:04 from (69.168.144.133):

In Reply to: 94 Chevy 6.5 diesel stuck on high idle posted by Nathan (SD) on April 25, 2015 at 11:53:02:

Nathan (SD) said: (quoted from post at 11:53:02 04/25/15) Anyone had this happen? Trans won't shift into overdrive either in this mode. Thanks

High idle was an option, it involves grounding a pin in the ECM(behind the glove compartment)with a switch in the dash.

I bet the wire from the pin to the switch is shorted somewhere or the brake switch has a problem( hitting the brake pedal should cancel the high idle as long as you keep your foot on it)

I have installed high idle switches in my 3 GMC trucks with the 6.5

I have the pin out of the ECM in my shop,.i can look it up if you want.

This post was edited by bison at 22:25:52 04/25/15.

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