Failing Fuel Pump- Question
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Senior User
Joined: May 2007
Posts: 156
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Failing Fuel Pump- Question
Okay my front fuel pump is going out in my 96 300. Here is my problem:
I can put gas into my back tank, and it will run perfectly, but my gas milage is like 10 mpg. What is happening is the rest of the fuel is ending up back in my front tank. Then I have to drive on the front tank to use up the gas, or else it will overflow out the cap. Right now the front tank runs, but the pump is definately getting weaker. My question is this: Is there any way I can prevent the fuel from going back into my front tank? This would be a temporary fix until I get time to drop my tank. I didn't know if there is a check valve that I need to replace or maybe there's a line I can pinch off? Please help me answer this question.. If I need to clear anything up let me know.
Thanks!
John
I can put gas into my back tank, and it will run perfectly, but my gas milage is like 10 mpg. What is happening is the rest of the fuel is ending up back in my front tank. Then I have to drive on the front tank to use up the gas, or else it will overflow out the cap. Right now the front tank runs, but the pump is definately getting weaker. My question is this: Is there any way I can prevent the fuel from going back into my front tank? This would be a temporary fix until I get time to drop my tank. I didn't know if there is a check valve that I need to replace or maybe there's a line I can pinch off? Please help me answer this question.. If I need to clear anything up let me know.
Thanks!
John
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
do a search on crossflow fuel tanks.
start here:
https://www.ford-trucks.com/forums/6...low+fuel+tanks
start here:
https://www.ford-trucks.com/forums/6...low+fuel+tanks
Senior User
Joined: Jun 2003
Posts: 292
Likes: 1
Originally Posted by Wynn96
Okay my front fuel pump is going out in my 96 300. Here is my problem:
I can put gas into my back tank, and it will run perfectly, but my gas milage is like 10 mpg. What is happening is the rest of the fuel is ending up back in my front tank. Then I have to drive on the front tank to use up the gas, or else it will overflow out the cap. Right now the front tank runs, but the pump is definately getting weaker. My question is this: Is there any way I can prevent the fuel from going back into my front tank? This would be a temporary fix until I get time to drop my tank. I didn't know if there is a check valve that I need to replace or maybe there's a line I can pinch off? Please help me answer this question.. If I need to clear anything up let me know.
Thanks!
John
I can put gas into my back tank, and it will run perfectly, but my gas milage is like 10 mpg. What is happening is the rest of the fuel is ending up back in my front tank. Then I have to drive on the front tank to use up the gas, or else it will overflow out the cap. Right now the front tank runs, but the pump is definately getting weaker. My question is this: Is there any way I can prevent the fuel from going back into my front tank? This would be a temporary fix until I get time to drop my tank. I didn't know if there is a check valve that I need to replace or maybe there's a line I can pinch off? Please help me answer this question.. If I need to clear anything up let me know.
Thanks!
John
https://www.ford-trucks.com/forums/6...-bad-tank.html
As a side note, I am still running on the rear tank and pump. I just recently bought a brand new pump for my midship tank on ebay for 33 bucks.
Next project is to put that pump in and the tank back in place.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
The best solution is going to be drop the front tank and replace the fuel delivery module, which will include all the correct shuttle valve/check valve mechanisms to solve the cross flow. I haven't checked any of the links posted above, but unless there's a simple way to block off the hoses, I don't see a quick fix.
