I was afraid of this suggestion, I really don’t want to pull the tank but such is life. Fortunately, I only have an 1/8 of a tank.
If the pump is the issue, when people convert to an external pump what is done about the internal pump / pick up?
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
Fuel Pressure Test Q - This is what I found on the pump
- Thread starter nvrenuf
- Start date
I was afraid of this suggestion, I really don’t want to pull the tank but such is life. Fortunately, I only have an 1/8 of a tank.
If the pump is the issue, when people convert to an external pump what is done about the internal pump / pick up?
Really you need to add a stainless steel compression fitting and extend where the pump was, adding a strainer for the bottom of the tank
An in-line pumps are loud AF
You’ll spend 3x the amount changing it as fixing it
What filter do you have?
An in-line pumps are loud AF
You’ll spend 3x the amount changing it as fixing it
What filter do you have?
Still the stock tbi type filter on the frame. If it was a filter issue, wouldn’t the pressure be constantly low?
I know the Holley etc pumps are crazy loud. What about the Airtex E2000 type in line pumps? It looks like an in tank pump but mounts with a clamp externally. I have seen these references on buggies and such.
I know the Holley etc pumps are crazy loud. What about the Airtex E2000 type in line pumps? It looks like an in tank pump but mounts with a clamp externally. I have seen these references on buggies and such.
Since the regulator is literally a month old I’ll probably pull the tank next weekend and check the rubber stuff. If they’re good I’ll Hail Mary a pump at it.
Ooooo I do likes a chocolate shake.
Only redeemable in Moab. You might have to tow your truck with Wades Frankenliner and Jimmy though..
I dropped the tank enough to get the pump / sender out and here’s what i found —
The short piece of hose between the pump and the feed tube on the sender bracket looks great, no signs of deterioration at all.
The sock is attached tight. It’s brown but no heavy build up that will wipe off.
Between the bottom of the pump and the “pocket” on the bracket there’s a rubber piece that I can’t remember if it seals anything between the pump and socket or if it’s just an insulator for the pump to rest on, regardless this rubber has almost turned to a goo. It is swollen and can be pulled apart by just wiping it hard.
Here are 2 different pics with a close up of each.
The short piece of hose between the pump and the feed tube on the sender bracket looks great, no signs of deterioration at all.
The sock is attached tight. It’s brown but no heavy build up that will wipe off.
Between the bottom of the pump and the “pocket” on the bracket there’s a rubber piece that I can’t remember if it seals anything between the pump and socket or if it’s just an insulator for the pump to rest on, regardless this rubber has almost turned to a goo. It is swollen and can be pulled apart by just wiping it hard.
Here are 2 different pics with a close up of each.
Now for a novice question....
At the time I was driving and noticed the fuel pressure dropping at the rpms climbed, the gauge showed between 1/8 and 1/4 tank, never below 1/8.
When I dropped the tank tonight it wasn’t heavy. I only dropped the rear and the tank is still hanging under the truck so I can’t physically see how much fuel is in there.
If my gauge reads a little high, could it simply have been running out of fuel (very low fuel plus moving away from the pick up)?
At the time I was driving and noticed the fuel pressure dropping at the rpms climbed, the gauge showed between 1/8 and 1/4 tank, never below 1/8.
When I dropped the tank tonight it wasn’t heavy. I only dropped the rear and the tank is still hanging under the truck so I can’t physically see how much fuel is in there.
If my gauge reads a little high, could it simply have been running out of fuel (very low fuel plus moving away from the pick up)?
Time for new pump and sock.
I agree it’s definitely a problem but does it do anything besides hold the bottom of the pump?
That rubber melting like that looks like a sign of the pump getting too hot.
It’s possible but I would think if that’s the case the rubber would still be pliable but hard-ish like new just in a new shape. This one is almost gooey, like a slippery play doe that will rub balls of material off of.
Maybe it is the ethanol in the fuel.
This ^^ could definitely be a possibility. It does seem like it’s breaking down. It’s all out of shape so it’s hard to tell but I guess fine particles could be coming apart and passing through the system to the sock / pump/ filter.
Time to run real gas if your going to let it set up for a while 
