STILL HAVING A BAFFLING ISSUE, NEED HELP BAD.
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Post Fiend
Joined: Oct 2003
Posts: 9,176
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From: Western Central NV
STILL HAVING A BAFFLING ISSUE, NEED HELP BAD.
.
.
This has been an on going issue. There is also a possibility that gas is going between front & rear tanks. (This is a 95 F150 where the fuel pump is in tank. NO HI PRESSURE Frame rail mount pump.)
My question is there anything else I should check before I have a new front tank fuel module installed. Also it was noted that sometimes the fuel pressure would fluctuate 5-8 psi. Then stop & run steady. Also the shop ran this truck for 5 days & couldn't get the truck top act up. It was find until this afternoon. If I go out now hours later it in the past would run just fine for days.
Any Ideas, or thoughts I'm baffled & so is the shop. In fact two different shops.
Fuel pressure would run 38-45psi. The only other baffling thing is twice it stopped on both tanks. My thought is maybe the check valve on the front tank fuel module is letting the gas from the rear tank bleed into the front tank & not let enough pressure or fuel to the injectors.
Any help appreciated.
The reason for the New Distributor & Module was a preventive maintenance move. We live in extreme heat & these parts are 18 years old & I wanted to make sure they were new.
Craig
.
This has been an on going issue. There is also a possibility that gas is going between front & rear tanks. (This is a 95 F150 where the fuel pump is in tank. NO HI PRESSURE Frame rail mount pump.)
My question is there anything else I should check before I have a new front tank fuel module installed. Also it was noted that sometimes the fuel pressure would fluctuate 5-8 psi. Then stop & run steady. Also the shop ran this truck for 5 days & couldn't get the truck top act up. It was find until this afternoon. If I go out now hours later it in the past would run just fine for days.
Any Ideas, or thoughts I'm baffled & so is the shop. In fact two different shops.
Fuel pressure would run 38-45psi. The only other baffling thing is twice it stopped on both tanks. My thought is maybe the check valve on the front tank fuel module is letting the gas from the rear tank bleed into the front tank & not let enough pressure or fuel to the injectors.
Any help appreciated.
The reason for the New Distributor & Module was a preventive maintenance move. We live in extreme heat & these parts are 18 years old & I wanted to make sure they were new.
Craig
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Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
A couple of notes. I installed a new fuel filter a few thousand miles ago. I also installed a new tank switch & fuel pump relay. You can hear the pumps switch tanks. What can go wrong with the tank selector valve or is there anything that would cause my issue?
Craig
Craig
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Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
I'm not sure if it is both tanks or just one. What is the issue of the return lines? Also a mechanic mentioned the FPR maybe allowing too much pressure sometimes which would increase flow on return lines. The issue I'm having is unlike what most would think. This morning I started it on the front tank & it sputtered a few seconds & ran rough then took off & ran fine. So a true GEMLIN or PACER not sure which.
Craig
Posting Guru
Joined: Jan 2004
Posts: 2,403
Likes: 4
From: Charlestown, RI
Bob,
I'm not sure if it is both tanks or just one. What is the issue of the return lines? Also a mechanic mentioned the FPR maybe allowing too much pressure sometimes which would increase flow on return lines. The issue I'm having is unlike what most would think. This morning I started it on the front tank & it sputtered a few seconds & ran rough then took off & ran fine. So a true GEMLIN or PACER not sure which.
Craig
I'm not sure if it is both tanks or just one. What is the issue of the return lines? Also a mechanic mentioned the FPR maybe allowing too much pressure sometimes which would increase flow on return lines. The issue I'm having is unlike what most would think. This morning I started it on the front tank & it sputtered a few seconds & ran rough then took off & ran fine. So a true GEMLIN or PACER not sure which.
Craig
What I was saying about the return lines is, when one tank starts filling up the other tank, it's because of the fuel not going back to the correct tank via the return lines. It's normally not fuel actually pumping from one tank to another directly.
The only thing that'd fail in the FPR is the diaphragm, and if that happened you'd have fuel in the vacuum line, and the truck would run horrible all the time.
At this point, I'd check pressure on both tanks, and proceed from whatever that tells ya.
Any codes stored?
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