When I press the accelerator to the floor my truck struggles to maintain 65-70 mph. I have to press the accelerator all the way to the floor to get it there. Is there a way I can adjust the accelerator linkage to make me not have to press the peddle down so far to get it up to speed? ALso do you think there is some else wrong to prevent me from getting any higher speeds or do I need to just make all those pump mods in order to get up to speed quicker??? Do you think this linkage stuff could also be the cause of my truck shifting in and out of 4th gear at around 50-55 mph?? Thanks for all your help

 

Ace or Materdiesel could probably tell you.... I'm done now. Have someone floor it with the truck off and then see if you can move the part were the throttle attaches to the pump further towards the truck. If it still has travel, you'll need to adjust it.

 

I am willing to bet the whole throttle system is well worn and out of adjustment. Ball ends, bell crank bushings etc., cable could be stretched even. Look at the pedal itself too, mine would lay over rather than pivot like it was supposed to. They were made cheap, cheap plastic crap if I can get away with that language... Adjusting it will help but replace those plastic parts so your not losing anything to worn loose fitting pieces, all the little things add up. Then go after the injector pump throttle lever, and make sure you get full travel on it when the pedal is on the floor.

 

Here is what I did. Look under the dash at the throttle cable and gas pedal. Pull on the cable so that you have a gap between the end of the cable and the gas pedal. Find a bushing or something to take up this extra space.

After that, I was hitting the throttle stop about 1" above the point where the pedal bottoms out. Now I've removed the throttle stop completely, and my pedal still does NOT bottom out.

You should follow sdstriper advice as well. Make sure you have full travel of the throttle!

 

If you cannot afford to spend about $100 bucks to make sure the throttle system is new and dialed in I suppose this will have to be the solution. I strongly recommend a person at least whittle away at the parts as they can if the budget is that tight. The problem with taking the slack out to optimize travel is the "slack" is still there, worn out parts such as a ball end connector could leave you stranded etc.

The throttle rod assembly (ball end connectors), breakover spring, bell crank bushings, throttle pedal (pivot shaft bushing etc)and throttle cable(stretch) are the items I would focus on. When the fitment is loose at best, there is considerable loss of throttle actuation. This also affects the automatic transmission throttle valve adjustment. When you change the throttle adjustment at the pump you need to re-check/adjust the TV cable as well.

 

Is there some kind of kit you can buy to replace all the plastic bits?

 

I thought my truck came like this from the factory. I'll look it over once again.

 

can you guys give me some part numbers or names to these items i should replace. I would like to do it right and replace all the parts you guys mentioned. thanks