On my last fill-up, I added some lucas oil fuel injector cleaner to see if this would help milage (don't we all need a little help here?), and after 5-10 miles or so, my 1993 5.8L f150 started cutting out under acceleration I think some crud in the tank has dislodged and clogged either the filter or the pump. If I floor it with front tank selected, it sputters and goes nowhere. While still floored, I can select rear tank and the truck takes of as usual. Kinda cool to have a switch that adds horsepower, but this is stupid. Anyway, wondering if there is separate filter for each tank and front may be clogged, or is this more likely a pump problem (I believe there are separate in tank pumps correct?) causing front tank to not provide enough fuel flow to run correctly. Hoping it is filter as this is much easier to change (found 1 by front tank, but didn't really have time to look for second one if it exists). Any help would be appreciated!

Jeff

 

Only one filter, they put it after the lines come together. Could be a pump problem or I have heard there is a switch valve that may need to be cleaned out. This shouldn't have anything to do with lucas cleaner, more likely you sucked up some crap out of the filling station tank. Give it a little time, you should get some good replys.

 

bcmontgomery is right - only one filter. I guess that lucas injector cleaner did it's job the wrong way - the dirt from the tank could get dissolved by it and started it's way to the injectors. Actually there are 2 more filters in each tank - one is inside of the tank and another is inside of the plastic pump shield. I guess that something is stuck in the fuel line or the inner filter is very dirty. I think that replacing the frame-mounted filter will not give any effect, because your rear tank is working fine. I suggest to ran of the fuel in front tank, take it off and clean everything including fuel lines and inner filter. After everything is done, add some gas (1.5 gallons) and measure the fuel pressure with tank connected, but not installed. If it will be less then 30 PSI - you'll have to replace the pump.

 

Thanks for the input guys What is the best way to get to the pump in the tank? Is it best to slide the bed back or drop the tank--remember I just filled the dang thing Can you get the pump out without doing either?
Jeff

 

I dont know which way would be better, the only one I have done was on a suv. We had a full tank to deal with and used one of those drill bit pumps that use a garden hose. Just run your back tank down and pump from one to the other. You may need to take the filler neck off, I dont know if it has a screen.

 

Thanks BC! Will try to get at this over the weekend and post results if I find the fix for the problem
Jeff

 

Buy a gas siphon pump instead of the drill pump. Drill have lots of sparks associated with them running. The gas siphon will be a small clear plastic line with a squeeze bulb to start the flow. Another option is to buy a cheap electric fuel pump and about 5 foot of gas line install the pump to discharge with about two foot of line to go to the jerry cans. This will need to be wired into a connector for power but will not spark by the gas or vapors.

 

yea ive heard of this happening before. a friend of mine put that stuff in his two jeeps. within a week he was replacing the pumps in both of them because they burned out due to the sludge that was broken loose.

 

Most people that I know of drop the tank, one brave sole in this forum cut an access hole in the bed. With out exposing myself to ridicule, hasn't anyone ever siphoned gas before? You don't need a mouth full of gas to do it. Fill up your siphon hose with gas before inserting into tank. As long as you keep your thumb or finger on the top end, the fuel will stay in place, lower hose to below fuel level and by golly it works.

 

Some suggest that lifting the bed is not that big of a deal if you have the right hoisting equipment, such as a cherry picker or a large tree in the backyard - only like 6 bolts and the disconnection of a couple of electrical harnesses.

Once the bed is off - clean and simple access to the tops of the tanks, or so I hear.

*edit* - just another thing to keep in mind whenever adding cleaners or sludge removers to anything - have to remember that the crap has to go somewhere! Make sure that the solution isn't worse than the original problem.