When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My neighbor was just over here with his 1995 f150. 5.0/auto/2wd/short bed.
The initial issue was when he put the selector to the rear tank, it didn't seem like there was any fuel being pumped. We disconnected the electrical connector for the rear pump and its getting power there. The gas gauge shows a reading for that tank, but the pump is not pumping. He already has a new pump from autozone just in case, so we decide to drop the tank and plop that one in. Thats when the first issue came up. The pump has some connector that will not plug into the harness on the truck. Most of the ones listed on autozone's website gave pictures of that same connector that wont work for this truck. So that's the first question. At some point in the 1995 production run, did they change the plug style for the fuel pump? I googled a picture to learn what the pins were, and ours matches the picture that google showed.
So anyways, we figure go ahead and get some more work done on it while we're already dirty. We finish dropping the tank and disconnecting the old pump. Filter is caked full of crud and has a gaping hole. No wonder the pump isn't working. Then we figure he can put the selector on the front tank and drive it around like that. Except when he fires the truck up, there is fuel pouring out the return line we have disconnected. Its pumping gas from the front tank up to the engine and that is being returned to the rear tank. Is this the correct behavior? Or is it possible that somebody has crossed some wires or lines somewhere around the fuel selector doodad?
I just ran out and looked to the fuel selector valve. When I follow the fuel lines along the driver's side frame rail, I do not see a valve like what picture online look like. What I see looks like a very basic tee.
This picture is taken from below. The lines coming from the left go to the rear tank. The lines coming in from the side are the front tank. And the lines running to the right of the picture head up towards the fuel filter and then the engine.
There is no fuel tank selector doodad. That is a simple tee connection in the photo.
What keeps the system from pumping all the gas from the front take into the back tank, and vice versa? I'm looking around online and some of these trucks have a part with 6 fuel lines and an electrical connection. It looks like that setup would do what you'd expect, connecting the feed and return lines for one gas tank to the engine, while cutting the other tank completely out of the picture.
03-20-2024, 07:02 PM
