I SUCK AS A TRUCK FATHER!!!
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Mountain Pass
Joined: Dec 2019
Posts: 141
Likes: 13
I SUCK AS A TRUCK FATHER!!!
89 F150 4.9 4 x 4 manual transmission breaking in my cam and now the fuel tanks electric valve decides to quit and my fuel push pump on the rail is not filling my carburetor. So where do you guys recommend the fuel tank selector valve to be sourced from and what style should mine have? Factory dual tanks and I have a pressure regulator upfront along with the return line. My front tank is absolutely chock-full my rear tank apparently doesn’t work but it is at about a half tank now after I put 4 gallons in it. My front tank registers 1/8 tank tops n dash switch but it’s full!
So I think my tank selector valve is bad I can feel my electric fuel pump working but it’s not producing any pressure up top
So I think my tank selector valve is bad I can feel my electric fuel pump working but it’s not producing any pressure up top
More Turbo
Joined: Apr 2018
Posts: 551
Likes: 151
From: King and Queen Virginia
More Turbo
Joined: Apr 2018
Posts: 551
Likes: 151
From: King and Queen Virginia
Then since you have the electrical tank valve may have to make sure it is working correct, front tank/rear tank wiring and plumbing. And I have not done one of them but I have seen a few post to do conversion.
Sorry I linked you to the old mechanical reservoir valve.
Sorry I linked you to the old mechanical reservoir valve.
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 141
Likes: 13
Amazon links don’t work for me, it only bring up Amazon search box anyhow.
I’ll get me a fuel tank wiring diagram and start checking power supply to the tanks first. I’m betting both in tank pumps are crap. It’s just my luck.
And the pump in the frame rail, although it’s humming, it’s not making any pressure, so I’m sure here goes another 300 bucks into the truck…. 😩😩
I’ll get me a fuel tank wiring diagram and start checking power supply to the tanks first. I’m betting both in tank pumps are crap. It’s just my luck.
And the pump in the frame rail, although it’s humming, it’s not making any pressure, so I’m sure here goes another 300 bucks into the truck…. 😩😩
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More Turbo
Joined: Apr 2018
Posts: 551
Likes: 151
From: King and Queen Virginia
The 87 I done back in spring had this dual function reservoir mounted in frame under drivers seat just before high pressure fuel pump.
Well the pump in frame rail sounds as it running and it will not make pressure at injector rail if no gas is making it to the pump and up thru filter from the in tank pumps.
The pump in frame rail should be MOTORCRAFT PF4 about 250$ but I would confirm my other pumps are working and fuel is making it to the HP pump before purchasing.
F1UZ-9B263-B
I had to put new rear tank,pump sender assy on truck it had been parked 14 years. The high pressure pump was frozen up also so had to replace that pump after bench testing to make sure it was bad.Well the pump in frame rail sounds as it running and it will not make pressure at injector rail if no gas is making it to the pump and up thru filter from the in tank pumps.
The pump in frame rail should be MOTORCRAFT PF4 about 250$ but I would confirm my other pumps are working and fuel is making it to the HP pump before purchasing.
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Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 141
Likes: 13
That makes perfect sense, I’ll remove the pressure pump this morning and bench test it, and I’ll find a way to do a test on the selector valve as well.
making coffee and sitting down to do some wiring diagram searching here in a couple minutes.
making coffee and sitting down to do some wiring diagram searching here in a couple minutes.
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 141
Likes: 13
You are a rock star! Thank you!
my engine bay wiring is cut all to ****, but this will help tremendously!
I do pray I don’t have to remove the dang bed to get this handled. I hope it’s just a sticky selector valve solenoid.
my engine bay wiring is cut all to ****, but this will help tremendously!
I do pray I don’t have to remove the dang bed to get this handled. I hope it’s just a sticky selector valve solenoid.
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