fuel pump help
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fuel pump help
having some trouble with my 89 f150 4x4 5.8l
a few weeks ago it would run but would shut down when it got hot. Did a tune up and was trying to diagnose the issue. narrowed it down to a fuel problem.
Couldnt test the fuel pressure at the rail as I didn't have an adapter that fit the schrader valve, but I was able to see that it was barely getting a dribble of fuel.
did some digging and found the PO put brand new pumps on it but eliminated the midship tank/pump. He had wired the mid pump onto the rear pump connector.
just to be safe I pulled both pumps (the in tank pump in the rear and the HP pump on the frame) and bench tested them, they work just fine.
when i was testing I ran a ground wire to the #6 pin on the test connector, and keyd on. When i did that it melted the ground wire I ran so something isnt right.
Anyone else had this problem? any ideas what it might be? I've replaced both pumps under warranty while I had them out, I put in a new FP relay, and connector since the pins were easily pulling out of the old one.
Is it an EEC issue? is it possible to test the EEC?
a few weeks ago it would run but would shut down when it got hot. Did a tune up and was trying to diagnose the issue. narrowed it down to a fuel problem.
Couldnt test the fuel pressure at the rail as I didn't have an adapter that fit the schrader valve, but I was able to see that it was barely getting a dribble of fuel.
did some digging and found the PO put brand new pumps on it but eliminated the midship tank/pump. He had wired the mid pump onto the rear pump connector.
just to be safe I pulled both pumps (the in tank pump in the rear and the HP pump on the frame) and bench tested them, they work just fine.
when i was testing I ran a ground wire to the #6 pin on the test connector, and keyd on. When i did that it melted the ground wire I ran so something isnt right.
Anyone else had this problem? any ideas what it might be? I've replaced both pumps under warranty while I had them out, I put in a new FP relay, and connector since the pins were easily pulling out of the old one.
Is it an EEC issue? is it possible to test the EEC?
Thread Starter
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New User
Joined: Jan 2011
Posts: 4
Likes: 0
It ran though, I traded for a van and he drove it to my house the way it is. Blew a trans cooler line on the way. I fixed that and found out it would run until hot then shut down. I did a tune up, then my father let the battery die. After that I'm now having the no fuel problem
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