Hi Mike,I had my motor rebuilt replaced all the sensors now it won't hold an idle,and if you give it gas it falls on it's face,I read where the Idle air valve,or stepper motor could be clogged ,the repair place have had my car a month now do you think thats a possibility?

 

I would need more info, like what exactly they have done, what codes they have found, the mileage and the year of the truck.

 

It's a 96 Discovery,I had the heads done,blocked decked,all new hoses and sensors,when I brought it in ,it ran like a watch just had loud noise from blown head gasket

 

Ohh and it has approximately 129,000 miles on it

 

With out fault codes or being there it is awfully hard to say what could be going on, and yes it could be the stepper.