MF! VX Kaput

[nfpgasmask]

IMO, this is the way to do it. It is "easy" to drop the tank I guess, but it is no fun especially if there is any fuel in the tank, etc. I am not fond of messing with gas. I am going to preemptively cut an access door in my Trooper for this reason. I am going to make it so 4 bolts hold it in and I can remove the door anytime I need to. A dead fuel pump would be BAD if you were out in the boonies.

Bart

[SuperBoomTurbo]

Greetings one and all. Today I had a similar problem and suspect the fuel pump. Was backing into the driveway and my truck just stalled without warning. Before I attempt the hatch cure, I have a question for those who've done this. I had 3/4 of a tank of fuel just prior to the stall (cranks hard still but no ignition), but now the fuel gauge shows dead empty.
Things I've checked thus far: fuel filter-pulled from the truck and cleared. Flow is perfect.
Pump fuse is intact and functioning.
Added about 4 gallons via jerry can, no improvement.

Earlier in the day, I added another 4 gallons via jerry can from my fuel ration rotation so I could put fresh fuel in two cans, though it was treated with Sta-Bil. Gasoline was just under 4 months old. Sta-Bil wouldn't jack up any sensors, would it? Runs my emergency geni and mower just fine, but neither are EFI.

I'm on a sleepless binge while my ailing VX sits dead in the driveway, and I'd rather not empty out the savings for a costly repair if the tank hatch works. Any other input, fellas? I'd really appreciate a cut reference as to how far in from the tail gate you guys cut. Going from left to right, it looks like the hatch should be cut between the 6th and 8th ridge in the floor. Sound about right?

[bartmanS4]

You say the filter flows fine so can you place a bucket under the filter with the tank side attached and the engine side in the bucket then turn the ignition to ON. This should run the fuel pump for two seconds. If you have flow then it's not the pump that's the problem. When I had my fuel pump fail the gauge was unaffected. Is the fuel pump relay working? You say the fuse is good but do you have 12V getting to the fuse? I looked at the schematic and the pump and gauge do not share a common circuit.

[SuperBoomTurbo]

You say the filter flows fine so can you place a bucket under the filter with the tank side attached and the engine side in the bucket then turn the ignition to ON. This should run the fuel pump for two seconds. If you have flow then it's not the pump that's the problem. When I had my fuel pump fail the gauge was unaffected. Is the fuel pump relay working? You say the fuse is good but do you have 12V getting to the fuse? I looked at the schematic and the pump and gauge do not share a common circuit.

I haven't checked it with a multi-meter yet. Too cold to work on here today, and my computer is having issues too. That was a relatively easy fix though (PSU crapping out).
Anyway, next warm day I'll try the bucket, but at the moment, I'm not getting any kind of pump noise like usual (the click or whine in the tank) at all.
Believe me, I'd rather this be a circuit problem and not a pump problem! And I thank for you the ideas to check, too. Keep 'em coming!

[circmand]

Earlier in the day, I added another 4 gallons via jerry can from my fuel ration rotation so I could put fresh fuel in two cans, though it was treated with Sta-Bil. Gasoline was just under 4 months old. Sta-Bil wouldn't jack up any sensors, would it?

I use Stabil all the time in my Jensen Healey, never had an issue. I thin it is just an additive to retard moisture build up