Search results

Dirty or failed, what I am getting is 7KHZ differential solenoid PWM signal being fed back thru the speedometer signal lines. These 2 signals share a 4 pin passthru connection on the front of the transfer case. If you were getting something similar, the rogue speed signal input might be great...

here is an alternate theory for you all to crunch on… I have come across a few people who have had intermittent issues with the transmission throwing speed sensor codes, myself among them when I select mode. What I am theorizing might be happening is that there is a weakness in the pass-thru...

Conditions for Engaging the Fast Idle System When all of the following conditions are present the idle speed will increase to the selected value and the FAST IDLE lamp will illuminate. The engine is running The transmission is in Park (P) or Neutral (N) Vehicle speed is not detected The FAST...

There may be some condition not met for it to enable/allow fast idle, like throttle position not low enough, or neutral or some such. Not specifically familiar with the specific requirements for fast idle, but it may be something like this causing your issue…