This truck is sold in two days and of course now it has to mess up. Im a nice guy and cannot allow a truck to be sold with problems. any how i noticed the rough idle yesterday and decided to do a tune up, cap, rotor, wires, plugs and some injector cleaner. What baffles me is the tuck runs and drives fine until I put it in reverse, then it bogs way down and almost wants to die. but if i hold the throttle at about 1000+ rpms it is fine. From what ive found on this forum im thinking that it may be a throttle position sensor. But everyone that has had a similar problem, they havent said anything about it only happening in reverse.
So im still baffled and the truck is going by by in a few days. so any help would be greatly appreciated.
thanks in advance
dirtracer242

 

Can't comment on the reverse only part of it. But, it could also be the IAC on the back of the TB. Take it out and clean it, and the bore in which it goes into on the TB.