Wierd Fuel Pressure Problem
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Wierd Fuel Pressure Problem
I'm having a really wierd problem on my '89 f150 (i6) w/ dual tanks. I was getting crossfeed from the rear tank to the front so i installed the OEM checkvalves indicated in the recall to fix the issue. But now, when I change tanks, i cant get enough psi to open the fuel path through the new OEM selector valve. Whats even worse is that i cant put it back on the previous tank, and get fuel flowing again. its almost like the newly installed checkvalves take all my psi away and then im just dead in the water..any help? By the way, each check valve was installed in each supply line at each tank. Because of the way they are made, you really can't put them in wrong. The selector VALVE is new OEM as well as the rear sending Unit and pump. I'm really thinking there is WAY too much resistence in the checkvalves.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by westsideblackshi
I'm having a really wierd problem on my '89 f150 (i6) w/ dual tanks. I was getting crossfeed from the rear tank to the front so i installed the OEM checkvalves indicated in the recall to fix the issue. But now, when I change tanks, i cant get enough psi to open the fuel path through the new OEM selector valve. Whats even worse is that i cant put it back on the previous tank, and get fuel flowing again. its almost like the newly installed checkvalves take all my psi away and then im just dead in the water..any help? By the way, each check valve was installed in each supply line at each tank. Because of the way they are made, you really can't put them in wrong. The selector VALVE is new OEM as well as the rear sending Unit and pump. I'm really thinking there is WAY too much resistence in the checkvalves.
<TABLE cellSpacing=0 width=624 border=0><TBODY><TR><TD vAlign=center bgColor=#c0c0c0>Campaign Number: 91V146000 Date: 1991-Sep-04 </TD></TR><TR><TD vAlign=top>Component: Fuel System, Gasoline: Storage: Auxillary Tank: Selector Devices </TD></TR><TR><TD vAlign=center>
</TD></TR><TR><TD vAlign=top>Defect Summary: THE DUAL FUEL TANK SELECTOR VALVE MAY MALFUNCTION
AND CAUSE AN OVERFILL CONDITION IN ONE OF THE FUEL TANKS, RESULTINGIN AN
OVERFLOW OF FUEL PAST THE FILLER CAP.
</TD></TR><TR><TD vAlign=center>
</TD></TR><TR><TD vAlign=top>
Consequence Summary: THE OVERFLOW OF FUEL PAST THE FILLER CAPCAUSES A FUELLEAKAGE, WHICH CAN RESULT IN A FIRE WHEN EXPOSED TO ASOURCE OF IGNITION.
</TD></TR><TR><TD vAlign=center></TD></TR><TR><TD vAlign=top>Corrective Summary: REPLACE THE DUAL FUEL TANK SELECTOR VALVE.
</TD></TR></TBODY></TABLE>
Last edited by subford; Dec 3, 2005 at 03:19 PM.
Junior User
Joined: Nov 2005
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From: West Chester
I had the same problem with my 88 f250 front tank was overfilling and flowing out the cap. Changed out this Dual Functioning Reservoir and problem solved. I had to order it at the Dealer, they didnt even stock it. Not hard to change.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by dldz
I was afraid of that, I wonder if someone here has a work around.
If not what you are looking at on the Bronco is just a fuel filter and I was under the impression that they started putting these on in 1987 FI Trucks.
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Joined: Jul 2003
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I'm working on my 86' F150, I just talked to Ford & they want $ 171.00 and have to order the thing. My Broncos got a whole nuther setup.
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Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
The recall is for fuel injected vehicles only. The return fuel line causes the overflow. You don't have a return line with a carb.
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Fleet Owner
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From: Easton,Ks
Originally Posted by dldz
I know I need that valve because it's not opening and closing the tank flow right. I guess I'll have to find one at a bone yard.
