fuel tank issue
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fuel tank issue
Ok, so I am having kind of a strange issue with me '89 f150. While driving on saturday I was using the front fuel tank and it ran out of fuel, no problem I switched to the rear tank and went to the fuel station where I filled the rear tank completely. I hadnt done a lot of driving at all however yesterday the truck started carrying on like it was out of fuel, so I switch to the front tank and keep driving no worries.
When I got home I got under the truck and listened to make sure that after recent work the fuel pumps were connected up correctly according to the markings on the switch, they were. Further investigation lead me to find that the rear tank was now empty but the previously empty front tank now had all the fuel in it.
My question is, has anyone else experienced this? and why would the fuel be pumping over to the front tank from the rear.
Any assistance would be much appreciated.
When I got home I got under the truck and listened to make sure that after recent work the fuel pumps were connected up correctly according to the markings on the switch, they were. Further investigation lead me to find that the rear tank was now empty but the previously empty front tank now had all the fuel in it.
My question is, has anyone else experienced this? and why would the fuel be pumping over to the front tank from the rear.
Any assistance would be much appreciated.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Tank selector valve is messed up. Common on these trucks. If one of the check valves gets hung up, it will return fuel to the wrong tank.
It's under the cab, on the inside of frame. Can't miss it, it has all the lines going to it.
It's under the cab, on the inside of frame. Can't miss it, it has all the lines going to it.
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Just has a look and the only selector valves that rockauto list are electrically operated and quite different to what is fitted to my truck. Has anyone had to source one of these valves that could point me in the right direction?
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
Ok, so I am having kind of a strange issue with me '89 f150. While driving on saturday I was using the front fuel tank and it ran out of fuel, no problem I switched to the rear tank and went to the fuel station where I filled the rear tank completely. I hadnt done a lot of driving at all however yesterday the truck started carrying on like it was out of fuel, so I switch to the front tank and keep driving no worries.
When I got home I got under the truck and listened to make sure that after recent work the fuel pumps were connected up correctly according to the markings on the switch, they were. Further investigation lead me to find that the rear tank was now empty but the previously empty front tank now had all the fuel in it.
My question is, has anyone else experienced this? and why would the fuel be pumping over to the front tank from the rear.
Any assistance would be much appreciated.
When I got home I got under the truck and listened to make sure that after recent work the fuel pumps were connected up correctly according to the markings on the switch, they were. Further investigation lead me to find that the rear tank was now empty but the previously empty front tank now had all the fuel in it.
My question is, has anyone else experienced this? and why would the fuel be pumping over to the front tank from the rear.
Any assistance would be much appreciated.
In Dash Tachometer?
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Joined: Jun 2006
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From: Ottawa, Ontario
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Ive got the 5.0 litre V8 with an in dash tach.
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From: Kentucky
You need to verify each low pressure in tank pump is functioning. A non-working in-tank pump will prevent the Dual Function Reservoir from switching between tanks.
No sense replacing the expensive reservoir when it's a fuel pump problem.
Some good info from Steve83: Fuel Reservoir Information
No sense replacing the expensive reservoir when it's a fuel pump problem.
Some good info from Steve83: Fuel Reservoir Information
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