throttle stuck wide open
 

The other day i was out 4 wheelin in the dodge, the truck was getting beat on harder then iv ever beat on any truck really, seeing alot of wot time, bouncing around over whoops in 3rd gear. on the way back in the truck just started to run away so i pushed the clutch and killed it, and towed it home. the throttle is stock at just short of wide open, you can move it little but it wont come back down to idle, wont come any lower then maybe 1/16" from full. the cable is slack, none of the return springs ae broken. the pump is just pretty much jammed, either that or im thinking some linkages got muddy and jamed up. what do you guys think?

also, i overheated the truck at the same time this happened, could this have something to do with it? didnt really overheat it that bad, mostly water and the radiator leeks a bit so its not holding pressure, under these conditions it boils out at only like 210 degrees, so its not like i severely overheated it. other then that nothing else is really broken, i can not believe the kind of abuse these trucks will take. hoping ill have an easy fix on my hands, if not easy at least closer to free.

o and some aditional information, i have no fuel plate, afr maxed out and he governor springs are stock but turned in 4 clicks each.

Rack is hung... Governor spring mishap... Who knows

yea iv read up a little bit on the stuck rack... looks like im just gonna take the afc off and get it to come free and run a ton of 2 stroke oil through it. iv been really slacking on putting 2 stroke oil in the fuel and i have to think that this is how im paying for it... especially on a hot day of beating on the truck with no fuel plate i really should have added some lubricant for the pump, who knows how reliable the pump will be in the future now.

have you checked your fuel pressure? sounds like you hung a plunger prob one twords the front of the pump

no i have not. iv got a guage but do these trucks have a regular test port or am i going to need something special to check the pressure?

your going to have to rig something up, sounds like yours is low and the lack of fuel could have seized the pump

well should i just change the lift pump? is the pump going to be done for now that it seized up?

The pump shop will make that call, first before you go buying things make sure its hung. if it is look into a better or new lift pump

nothings going to any shop... i am the shop. if it needs a pump ill buy a new one from a salvage yard from a later model with a higher rating.

why would you do that? If it were me I would just send her to the shop and let them work there magic

I think what he's saying is sending the pump out to a pump shop, not the whole truck. A good pump shop will be able to set you up with what you need.

thats what I was saying sorry for the :s:

jeez dave :tttt::tttt::tttt:

pumps are not a back yard deal. precision doesn't come in a beer bottle. for a pump a shop is always the way to go. everything needs to be clean and precise. You cant eat your pb&j while doin it

i poored a gallon of 2 cyle oil in the tank, and pried the pump free. running good again. i think between he motor overheating and me only having 1/4 tank and sloshing it around over the bumps offroading i just gave the pump a hell of a time trying to get fuel.

all the linkages and cable sand such are also in very sad shape, the rach isnt getting nearly full travel due to worn out linkages.

I had a communication breakdown :rocking:

Glad it's running again. Gladder that we don't drive on the same pavement.

well its seized again...

did you ever check your fuel pressure?

pumps are not a back yard deal. precision doesn't come in a beer bottle. for a pump a shop is always the way to go. everything needs to be clean and precise. You cant eat your pb&j while doin it

HAHA ..Ive Built lots of pumps and engines with a buzz...:pca1:

Have you replaced the o ring seals at the fuel heater ? you could have been getting air in system and caused cavitation damage to the pump it should go to fuel shop and be torn down and inspected seal kits are cheep and labor isn't bad If you do that you will know where you stand !

no i have not done anything with the fuel system on this truck ever, other then changing the filter of course. Where is the fuel heater located?

wouldnt it make sens to say the lift pump is of concern, being that the pump has seized in the past, of course it only does it when im out of diesel but wouldnt it make sense if the injection pump is only recieving just barely enough from the lift pump? my only concern is that the system should still prime up with a bad lift pump... but not really becasue i can prime it up but then after a few sputters its got air again, that could jest be beacuse the lift pump isnt providing any fuel for the injection pump...