It is not the same setup as the 87-91's.

They use the regular pumps in the tanks and a high pressure pump on the fuel rail. 3 pumps altogether (unless you only have one tank)

The 92-96's untilize high pressure fuel pumps in each tank and no fuel pump on the line. So it's very likey different fuel line components like the regulator and check valves are different.

It's a lot more likey since I had the exact same problem and that we both have the same year trucks and engines that it's the same problem I had and not that of a truck 7 years older.

 

There is no recall for the '96 model is there???

 

The only recall there was for the '96's was for the door jam sticker...some had the wrong info.

 

no sprocket . i have high pressure pumps in the tanks and i DO NOT have a pump on my fuel rail .

 

Ok then I was mistaking my years but it doesn't apply to all 87-91's some where in those years it is when it switched to the 2 high pressure pumps in the tanks.

 

ok , i can accept that . but my 90' has high pressure pumps .

 

I have a few more questions for everyone...

Is there a way to check the return valves on the fuel pumps? Can they be replaced seperately from the fuel pumps, or do you have to replace the pump(s) itself? Are these the same style fuel pumps that a mustang uses?


Thanks for the info,
scott

 

i dont know on the 92-96's , i know on my 90' they only replaced these "check valves" and the fuel pressure regulator .

 

I am having the exact same problem. My fuel pressure at the rail is 55psi. I am also having performance problems. Could this fuel pressure be the problem?

thanks,
NORDFORD

 

Sorry to raise an old thread. It appears to match my problem. My truck is an '89 302 long bed.

I always get better mileage from the front tank than the rear. City driving in Los Angeles, with the A/C on 75% of the time and the windows always closed, I get 14.5 - 15 mpg from the front tank and 11 mpg from the rear. If I am very, very careful and lucky, I can get 17 mpg in the winter with no A/C from the front and 12 mpg from the rear.

I have never smelled any gas from the truck, nor have I seen any overflow. I've been checking for two years. I've tried using the both tanks first and the results don't change. I've tried running the tanks dry (one at a time), switching to the other one (which is full), running it 1/2 down, then switching back to the empty one. It is still empty. I have been scratching my head. There must be a slow leak in the line from the rear tank or in the rear tank, but I can find none! The tank level will not change If I let the truck sit a month.

The check valve recall does not affect my truck. Here is the quote from the US gov NHTSA site: "SYSTEM: FUEL TANK, AUXILLIARY.VEHICLE DESCRIPTION: VANS AND LIGHT TRUCKS WITH DUAL FUEL TANKS PRODUCED IN THEFOLLOWING PERIODS: F150, F250, AND F350 LIGHT TRUCKS BUILT BETWEEN FEBRUARY 28,1989 AND JULY, 1989" My truck was built in Oct, '88.

Does anybody have any ideas? HELP!

-Lance