1991 Ford Pickup - Fueling Problem

Most of the trouble I see at work related to poor fuel fill quality has to do with the evap canister being restricted or the evap vent system has a pinched hose or some sort of restriction. I would look at this area for a problem.

Would you please tell me where this evap cannister is located? Thanks to all for the advice.

It's normally mounted to the firewall or fender or in that cubby hole behind the right side headlight, anyway you will find it between the fuel tank and the engine.

The following link contains additional information specific to the ford evap sys and testing procedures

http://www.asashop.org/autoinc/march2002/techtips.htm

It looks like this

Thanks, I will check this out. You are my friend.

John,

My F100 '90 series Ford had a similar problem.

We fixed it by changing the pitch/fall of the filler neck\pipe to the tank.

On some models there the pitch is only shallow and the fuel builds up in the Neck and the escaping air blows fuel back, which trips the nozzle.

If you can straighten the filler neck and increase the fall to the tank filling will be quicker and less painfull, but will depend on the body type as to the level of success..

Regards,
Sapper

In addition to the information in post #2 foaming of the fuel contributes to a need to fuel slowly. Some have enlarged the tube reducing the foaming action. The vent tubes aren't designed well or not an actual design for diesel fueling.

If is a great irritant replace the fill tube with a minimum 3" ID though I prefer 4" so the 60 gallon/min nozzle can flow into the 35 gallon tanks w/o restriction

I have a 1995 twin tank gas F-250 pickup that has the same problem. I just pull the fill nozzle out of the fill tube about 2". Works for me!

Seems the fill nozzle angle into the filler tube affects the fuel going down the fill tube.

I have a 1983 F350 and I have a simular problem with my back tank more than the front tank. My rear tank can be slowly filled by rotating the nozzle nearly upside down as I slowly feed in the fuel, it is still a long process. Some of the stations pumps are less of a problem than others but, I believe that is due to the pump pressure varies from station to station. One other thing to try is to keep a piece of wood to drive the rear drivers' side wheel up on at the pumps. This increases the slope to the tank and should help you with your problem.

Ray

I had a 1989 Ford Pickup and it had the same problem. I mostly lived with it, but I also learned the leave the nozzle part way out trick. However, you have to watch carefully, since there is a possibility of a burp at the end of the fill that rushes down the side of your truck and all over the pavement. If you pay attention you can hear when the truck is almost full then just quit filling.

Also, if gas prices don't change drastically, you can pretty much estimate what it will take to fill the tank at any given fill-up by the gas gague - then only fill that much or listen carefully when you reach that point. With two tanks, you don't need that extra 10 cents worth of gas anyway.

With the nozzle out a couple inches I usually could get the pump to run full speed after a try or two, and could fill in about the same time frame as my Dodge Truck.

You would think that over a decade's time FORD could deal with such a simple issue, but I guess if the public is willing to pay for a crappy design, then they get a crappy product... That and the famous Oil Filter between the firewall and engine (just below the exhaust manifold) trick is why I don't buy Ford products anymore, and would not feel bad at all if they went away.

Given the age of the truck I would expect that the fuel tanks have been removed to replace fuel pumps. In replacing the tanks special attention must be given to install the vent tube fully into the bracket located at the top of the filler neck of the tank. This is difficult but not impossible and usually done improperly resulting in the problem you describe.

I forgot to mention that the vent tube is inside the filler tube.

Has the box or fuel tanks been removed at some time? The inner tube in the filler tubes is kind of a pain to hook back up and if only the outer tube was connected, the fuel will flow into the tank through the outer filler tube restricting the air trying to excape from the tank.

Have you checked for a service bulletin about this problem? I had a 1990 Ford with 2 tanks and did not have the problem you describe. It seems to be a venting problem while filling. They are non-vented tanks with internal fuel pumps for air pollution.