Alliant made some of the OE parts, like the injectors. I've used one of their IPR's and it's been good too. I don't know who made the OE bowls, but could have been Alliant. If you're needing/wanting it fast I'd prob take a chance on it.

 

I have a new Alliant bowl ordered. Hopefully here tomorrow.

Edit: The glow***** fp gauge is in, ill get that rigged in to watch things.

 

Fuel bowl get!



Ill install it this afternoon with the gauge. Im giddy.

P.s. This is the Alliant bowl.

 

With the parker seals on the fuel lines the fittings just have to be snug.

Don't go ugga dugga tight. That's how aluminum threads get stripped.

 

Looking forward to your upcoming post!

 

This is a GOOD one.

Got the new fuel bowl in.

Still no start. No fuel pressure. Some fuel is getting to the bowl. It like come is a short burst, then nothing. There is a strange clicking noise near the fuel bowl, maybe at the supply line? It was consistent, like a click every half second. Im going to get a gerry can and run a line right to the pump. This will eliminate everything that is the vege oil system for the supply. I maybe just do the same on the return too.

Then i can attach directly to a tank and bypass the manifold should that change something.

Maybe there is some intermittent issue with the old vege system and its effing with me.

Maybe the reutrn is effed but i opened the drain valve, and tried it with the fuel filter cap off, and i mean the bowl is still half full maybe. Just a spash and then nothing comes from the supply.

Pump is running. Its not surging like it was before, but maybe sounds empty. Still the new pump. Ill do a dead head test again.

I may have to take the batteries and charge them.

I think regardless, the vege system has gotta come out. That will be a weekend job. I need a bunch of fuel line and ill just replace all that. Do more diagnostic stuff, but something is still messed up.

Whats the size of the reutrn line in the factory tank, like the part on the pickup? I need to change the return routing in the tank.

 

Does the standpipe in the fuel bowl still have the valve in it?

 

Yes. Its a brand new bowl.

Issue is there is hardly any fuel getting to the bowl.

 

Gut the standpipe.

 

Have you measure the Fuel Pump pressure PRIOR to the fuel bowl??

it should be between 50 to 80+
IIRC, 50 psi is minimum for safety.

 

If the bowl isn’t filling something downstream is jacked, pump, switching valve, fuel line or tank.

Gutting the standpipe only helps for the upstream which is heads and injectors.

Assuming the tank selector valve is controlled by a 12v switch have you confirmed circuit continuity, good voltage and is the valve fully opening to the selected tank.

What’s the current temperature where you are? Could it be fuel gelling?

On the weekend you had 80psi and now it won’t fill the bowl. I’m like IDK…WTF… nothing but spitballing from here.

Like you said earlier you could try to bypass the selector switch, but before you go there run the fuel pump feed line into a jerrycan and see what happens.

 

The reason I say gut the standpipe is to get rid of another variable in the troubleshooting chain. The holes for the valve in the top of the stand pipe sometimes go out of alignment and block the fuel from flowing, even with the fuel filter inserted and pushing down on it.

 

.

Deadhead on the factory Bosch fuel pump will be close to 100psi.

Regulated pressure to the injectors should be between 50-70 psi. Factory fuel pressure regulator spring is 55psi.

 

Agreed, and I have read threads where that was the cause of a no start, but that won’t stop the bowl from filling, just stop the flow from bowl to heads.

 

So to go over a chain of events.

Fuel pressure was unknown before issue.

Truck died mid flight, like it ran out of fuel

Pump sounded bad so i swapped it. No change.

Bypassed aftermarket filter. No change.

Did a dead head test with 80+ psi measured from the supply line at the fuel bowl.

Found the totally busted regulator. Replaced with dorman, it failed to, so i bought a whole new bowl.

With the dorman regulator, the truck started and ran for a few minutes. Fuel pressure pre filter was 95 psi. Another possible failure but fuel was coming into the bowl. Pressure only built to about 20 psi beforeni cranked it.

I switched to a dorman drain valve, and it failed too. The stock one failed. Internal seals were blown.

Swapped the bowl, now fuel wont make it to the bowl very well. Some fuel makes it, but not much. I know the bowl should fill with the cap off in a few seconds, and it does not. I had the fuel pressure gauge on and it was zero from the pre filter (mechanical gauge, not the glowshift). Bowl was about half full.

I think the next step is to bypass the tank switch manifold thing and see if that changes anything. Its a big variable, and there could be some intermittent failure happening. Im betting it will. I swap the reutrn to so i can see that working.

I go back to the truck tomorrow. Ill bring a gerry can.

The truck WILL run by sunday lol. I have the whole day with it on sunday, even if it means running all new fuel lines and ditching this alternative fuel system.

Maybe i missed a plug or something in the bowl? Fuel does spill out of the supply port of the fuel bowl. New filter is clear. Ill do another dead head with the tank system bypassed.

Gotta eliminate this fuel system at this point. There isnt much else to look at.