My 94 auto has developed another problem. I first noticed it when on the highway. The truck would start bucking. I would WOT the pedal, and the truck would die. Open the hood to find that the throttle shaft on the inj. pump is stuck at WOT. I would move it back to idle, check the gas pedal, start the truck and continue. This happened a couple of times. It has now progressed to needing the accel pedal pressed down to start the truck (never had to do this before) and feather it to keep it running until the idle stabilizes. When the truck is running and put in gear the truck idles horribly and may die. When in gear and trying to accelerate and the pedal is pressed down it is very slow to return. I have disconnected the throttle cable and made sure it is not sticking. Any other ideas out there?

 

is it blowing smoke when it does this? I'm thinking maybe the governor arm is sticking.

 

Follow the go pedal to the throttle linkage. The linkage should have a turnbuckle in the metal shaft to the injection pump.

Push the go pedal to the floor and see how much more you can move the linkage to the full position. If there is no more movement towards the pump, back off the linkage using the turnbuckle.

If you can move the linkage more towards the pump, you can adjust the linkage to give you full throttle when you depress the go pedal. If you can do this, your problem is most likely the bushing at the linkage pivot point towards the fire wall.

They will hang up or give you a rough spot in the pedal that you can feel when you push the go pedal. You might even see the bushing hanging out of the housing. In any case check the bushing.

Dave

 

Don't mess with the turnbuckle, it's set at a certain length and shouldn't change unless someone has already messed with it.

Your problem is the throttle return springs. There are two of them, one inside the other that stretch between the power steering pump and throttle linkage.
The springs may have just become disconnected or the ends broke off.
Replace with hardware or autoparts store springs for less than $10 or go to the dealer and get ripped off.

 

Ding, ding, ding. No throttle springs present. I don`t know ir the truck has ever had springs since I have owned it. I believe it has been the trans kick down cable that has been pulling the throttle back. The cable has now begun to fray and bind causing the throttle issues. I will replace the cable and install springs and see where I am at.