On the front tank the truck will run fine, but the back tank is another story.
After I switch over to the rear the truck will run but not accelerate. I can even start the truck of the rear tank, but the thing just won't accelerate or if it does it is spitting and sputtering.
Thanks for the info guys!!!!


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1993 F150
I6, 4Spd , 4x4
fortini01471@cs.com

[This message has been edited by sfortini (edited 03-07-2000).]

 

Could be a clogged fuel filter.

 

Dirt bike Dave - I was under the impression that the truck had only one fuel filter. Please keep in mind I bought the truck one week a go this past Saturday, and it broken down four days later and I just got the thing back from the dealer I bought it from, after complaining to the Attorney General in MA.

Thanks for the help

 

Pastmaster will know how may fuel filters are on your truck and where. He'll probably be along any day. Your symptoms sounded like that to me. I've known a few people who have clogged filters, especially after running a tank real low and sucking the sediment off the bottom of the tank.

You might try searching older threads - I think people have had this problem before. Good luck.

[This message has been edited by dirt bike dave (edited 03-08-2000).]

 

I have to disagree with dirt bike dave about the fuel filter getting clogged "especially after running a tank real low and sucking the sediment off the bottom of the tank".

The fuel pump always draws from the bottom of the tank. Or else, you would run out of gas before the tank got empty.

What probably happened was that the tank was empty for a good while and when they filled it up, the rust that had formed in the tank and filler got washed down and got picked up by the pump.

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1997 F-150 4X4 ORP, pacific green, 4.6L, K&N filter, DeflectaShield bug shield.

 

Sounds like a fuel filter to me too. I'm not sure, but I thought the filters were in-tank filters like on our 97+ trucks. I agree that pastmaster or fordfixer will know this when they stop by.


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Chris Thomas
1998 F-150XLT Flareside STX Sport Package, 4.6L Auto 3.55 Oxford White/Gray interior, Factory Anti-theft system
Picture: http://216.147.104.171/Y2K/members/ChrisT/christ1a.jpg
Homepage: Chris & Brandi's Universe
Mods: A.R.E. Decklid/Oxford White with gray fabric liner, K&N filter with Airbox Mod (removed silencer), Lowered 3" front/5" rear, Tinted Windows, GTS sloted taillight covers (painted Oxford white to match), Removed STX stickers
Audio: Kenwood Truck speakers with 10" woofers, Rockford Fosgate and Alpine Amps, Ford 10 disk CD changer
Future Mods: 20" rims and tires, True duals with Supertrap tunable mufflers, Superchip, Supercharger, Jacobs Ignition, and whatever else I can think of!!!

 

There are multiple fuel pumps and a change-over valve assembly on that model. Probably want to get a Haynes or Chiltons to learn which of many change-over type systems there were, unless one of the other folks has the same year.
About dirt bike dave's comment, I have found that running a tank down to near empty increased chances of trouble with crud in the tank causing trouble, like plugging filters. True, the pickup is always at the bottom, maybe some of the stuff floats, or the sloshing action of a near empty tank scores more stuff off the tank walls or something. I learned my lesson on this, repeatedly.

 

There is only one fuel filter on that model pickup (at least there was on my '92). There is a fuel pump in each gas tank and the fuel lines come together into one filter. I would replace the filter, then if the problem still persists, maybe check the screen on the end of the fuel pump in rear tank. Have to drop the tank and remove the fuel pump to check it. I had a screen get clogged up in a Mustang years ago. The car would just die going down the road and would not restart until it sat for a while and whatever was clogging the screen settled back into the tank.

 

There was a post awhile back concerning this. Seems the person posting found his problem to be a bad pump or valve. It really wasn't too serious, but was a pain to diagnose.

 

I had the problem your experiencing on my 1989 F-150, it was the front fuel tank that ran, but the back one wouldn't switch over. It turned out for me, that it was the dash switch. Mine wouldn't even start in the first place. Curious, you say you can start, but acceleration. Other than the filter, my guess would be a bad pump or the switch valve like Fordman and others stated. There is only 2 hi-psi pumps on the newer models. Before, you go and shell out money for a new pump, have the filter replaced, and have them check the psi from the back tank!

 

Well, thank you everyone for your input. I will start checking this problem out over the weekend. I do have the Chilton's book and will spend some time going over the issue.
Also, I am new to the board and would like to know if posting negative threads about used car dealers is allowed? As I said I got the truck on 2/26/00 and it blew the e-brake,water pump, belt on 3/1/00 and was at the dealer until 3/7/00. Needles to say this dealer leaves a lot to be desired.

 

Sorry to hear about all your problems. There's a thread for dealership discussion down below. Sharing your experience may help others avoid the problems you've had.

Now, for your problem: If it is like the '93 that I just traded off, then you only have 1 fuel filter. Doubtful that it is the the problem. Could be the switch, but I doubt it since you say it runs (idles) on both tanks. Could be a bad wire to the back pump, or even the pump itself. Finally, it could be the selection valve not opening fully. I suggest perusing the 80-96 mailing list archives at www.ford-trucks.com There have been several guys that have the same problem you are experiencing.