1988 F150 5.0 Fuel pump Problems
#13
Senior Member
iTrader: (1)
I know people have had better luck with NAPA pumps, but I don't know how they stand up long term.
We know motor craft pumps last really well. I think they use Walbro for the actual pump.
It could be a problem with your truck, of course, but most guys who plan on keeping their truck long term and don't want to worry about the pumps insist on motorcraft.
I know they charge a lot more but....mine are 19 years old and still pumping 43 psi. I might just be lucky, but I do hear the same thing a lot.
We know motor craft pumps last really well. I think they use Walbro for the actual pump.
It could be a problem with your truck, of course, but most guys who plan on keeping their truck long term and don't want to worry about the pumps insist on motorcraft.
I know they charge a lot more but....mine are 19 years old and still pumping 43 psi. I might just be lucky, but I do hear the same thing a lot.
#14
Junior Member
Thanks Chris. I don't think it is the pumps. I keep switching back and forth between front and back. Don't think they would both go bad at the same time. Seems to me something is heating up, and at a certain point it just shuts down the fuel flow. I put in two new 30 amp relays, but a friend suggested I try 10 amp relays.
#15
Senior Member
iTrader: (1)
You could check the voltage to the pumps.
Would be worth checking the fuel pressure too, in case it's not the pumps. (spark ?)
Worth checking the tps as well.
There is a connection under the fuel pump relay that can go bad (due to constant current maybe ?). Gotta unclip the power distribution box and take the bottom off to check that.
And there's always the computer itself, which sounds real bad but is actually cheaper than a lot of other parts.
That's all I've got at the moment.
Would be worth checking the fuel pressure too, in case it's not the pumps. (spark ?)
Worth checking the tps as well.
There is a connection under the fuel pump relay that can go bad (due to constant current maybe ?). Gotta unclip the power distribution box and take the bottom off to check that.
And there's always the computer itself, which sounds real bad but is actually cheaper than a lot of other parts.
That's all I've got at the moment.