The Truck is an 82 F-250, 110000 miles. Sat for 3+ years. Replaced the fuel filter on the Carburetor when I bought it and ran out old gas to get it running (not much in the tank). It had a fuel leak around the carburetor. before I could change the fuel line (rubber hose portion old and cracked) and throttle pump diaphragm (leaked) I had a fire. I replaced the fuel filter, throttle pump diaphragm, throttle solenoid, some vacuum lines, fixed a couple of electrical wires. I changed the Rotor cap and adapter, as well as spark plug wires. It has new airfilters. It starts up great (having to get used to the old carburetor pumping) and runs to warm up. I get about a mile to 3 miles down the road and above 45 miles an hour and it starts acting like it is running out of fuel, but if I slow down to 45 it will generally smooth out and run, when I try to go back up to 55+ it will start the "bucking and snorting" all over again. I have not rebuilt the carburetor yet, but plan on doing that. Is there something else I need to look at?

 

Replace all rubber fuel lines from carb back to the tank (s).
They may look good on the outside but break down inside and plug up.
Dave - - - -

 

Ok, thank you.

 

 

Sorry 5.8L 350W Mechanical on the block, but I am also told that at least one tank fuel pump and a transfer pump. Everything was working fine (except for the leakage) until the fire. I got it put out pretty quickly but it still did the above mentioned damage.

 

 

We rebuilt the carburetor changed rubber fuel lines and in-line fuel filter from rear tank to transfer pump. Ran fine for about 24 miles. I turned on the cruise control and within a mile it started bucking and jumping. As long as we stay under 45 it seems to run ok, when we get above it starts the bucking and acting like it is starved of fuel. We have shut it off twice to see if something would reset, but did not work. Any ideas?

 

 

I have not checked. Will ha e yo do and report back.

 

What pressure should it be?

 

First make sure your pump is fine. After that you might want to check out your electronic ignition box on the driver's inner fender.
Those are old school solid state devices and are known to overheat. Yours either could have worn out naturally, been damaged by the fire indirectly, or is just overheating as you try to run it down the road.
If changing your fuel pump doesn't fix the problem, put some washers between the inner fender and the box so it has better airflow. If it still has problems, get a new box (expect to pay $30-35).

 

Thank you.

 

You have both a mechanical pump on the block and an electric pump? Veeery interesting!!!