Man do I have issues!
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Freshman User
Joined: Mar 2004
Posts: 45
Likes: 0
From: Kentucky
Man do I have issues!
Quick questions:
I posted a while back, and didn't really get some satisfaction on this issue:
The front tank on my 96 f150 gets around 20-21 mpg, but my back tank only gets 11-12 mpg. I have NO leaks. I have no pumping from one to the other. When on the back tank, the truck is obviously running rough, as the engine bucks and jumps and misses. I need causes, and solutions.
I have heard that there's a low pressure pump in tank and a high pressure pump on the frame. Is this correct, and could the low pressure pumping too much be the problem? I need some help, because gas is up to $2 a gallon in my area, and I drive 120 miles a day.
I've checked for sugaring or contaminants as directed before, and found nothing. Help!
I posted a while back, and didn't really get some satisfaction on this issue:
The front tank on my 96 f150 gets around 20-21 mpg, but my back tank only gets 11-12 mpg. I have NO leaks. I have no pumping from one to the other. When on the back tank, the truck is obviously running rough, as the engine bucks and jumps and misses. I need causes, and solutions.
I have heard that there's a low pressure pump in tank and a high pressure pump on the frame. Is this correct, and could the low pressure pumping too much be the problem? I need some help, because gas is up to $2 a gallon in my area, and I drive 120 miles a day.
I've checked for sugaring or contaminants as directed before, and found nothing. Help!
Senior User
Joined: Apr 2004
Posts: 368
Likes: 0
From: NH
try and put a fuel pressure guage to it then switch the tanks and check the readings. it sounds like a fuel pump problem. as for the two fuel pump thing last time i put a filter (on the frame rail) and a pump in the rear tank of my buddies 96 f-150 i didn't see another pump on the frame rail, only a divider solinoid. what your truck is doing sounds like what his was doing and the rear pump replacement fixed it.
Thread Starter
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Freshman User
Joined: Mar 2004
Posts: 45
Likes: 0
From: Kentucky
I kind of hoped it wasn't a pump in the tank problem. Aren't those pretty expensive and a pain in the butt to replace? I've thought about plumbing the back with a hose mounted low on the tank to the front tank, with a check valve to stop back flow. Essentially, I hope to have one big tank, but two fill up points. Can I do this without leakage?
Senior User
Joined: Apr 2004
Posts: 368
Likes: 0
From: NH
if my memory serves me right it realy wasn't that bad. the pump was like 80 bucks and as far as changing the pump just hose the bolts with a good penatraiting oil for a couple of days before you change it. MAKE SHURE you run that tank close to empty before droping it the job is a lot eaiser with an empty tank. as for linking the tanks i don't see why not but it may be a lot more of a hassle than you think. to save your self the headace try putting a fuel pressure guage to it just to be shure.
Last edited by robduval; May 9, 2004 at 11:48 PM. Reason: add info
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