GREETINGS TO ALL. I HAVE A PUZZLING PROBLEM ON MY 1990 FORD BRONCO II. IT IS A 2WD 5 SPD AND WHEN I TRAVEL ON THE HIGHWAY IT WILL DRIVE FINE BUT HALF THE TIME IT WON'T LET ME DRIVE MORE THAN 5-10 MILES BECAUSE IT STARTS TO MAKE THE TRUCK SHUDDER OR BOG DOWN. HARD TO DESCRIBE. I HAVE CHECKED THE CODES ON IT AND THEY ALL CLEAR OK. I ALSO HAVE CHECKED THE PLUGS, CAP, AND ROTOR. IT FEELS MECHANICAL BUT I'M AT A DEAD END. ANY ADVICE OR HELP WOULD BE GREAT. THE TRANSMISSION HAS BEEN COMPLETELY OVERHAULED ALSO. IT TRAVELS PERFECTLY IN TOWN THOUGH.

 

Have you checked your timing?

 

Can you clarify what you mean by 'they all clear ok'? Are they 11's for KOEO, continuous, and KOER? If so, do the timing check (SpOut connected and disconnected) as wolffpax suggested as well as a fuel pressure check.

 

Try a fuel filter, sounds like one to me it happened to me with my toyota over the summer, was fine on backroads but nutless on the highway then twards the end of my trip i had to do a big steep hill, had to creep up in 4 low just to keep the rpms below 1.5 thats how bad she got, but thats just what it sounds like with your bronco.

 

FOR FASTPAKR I'M NOT SURE HOW THE CODES WERE PROCESSED. I HAD A FRIEND RUN A DIAGNOSTIC COMPUTER FROM EVERYTHING TO KEY OF TO KEY ON AND WITH THE ENGINE RUNNING. HE SAID IT WAS FULL CHECK THAT HAD POSTED NO PROBLEMS TO THE COMPUTER, IF THAT HELPS.

 

Had the same trouble. Ended up being the fuel pumps. The one in the tank was intermitant.

 

how much should I expect to be charged for the fuel pump and labor?

 

You are far better off doing this yourself!
To take it into a shop would be pretty costly for sure.
The pump in the tank is about $50.00 or less. The main high pressure one that sits on the frame by the drivers side seat is about $100.00 or less.
The one on the frame takes about 10-15 minutes to do. Make sure you vent off the pressure on the lines before you take any lines off!! You can use the vent that is located on the intake manifold. Looks like a tire stem sticking up. (if you have fuel injection)
The one in the tank is much easier if you cut a whole about six inches square out of the back floor above the fuel pump on top of the tank. You just unscrew the ring and pull the old one out. In all this shouldn't take more than an hour at most. (Even with a beer or two to help)LOL. There is also a fuel filter in the frame ahead of the mani fuel pump that most people miss. It should be about a foot in front of the main fuel pump.
Behind the main fuel pump is another filter in a black plastic canister to change too. You take out two bolts and take the lines of. The canister will unscrew and come apart with some effort. Couple of bucks for that one.
Have any more troubles just ask.
The Chipster or the other guys here.