oscgalis

I just took my fuel tank down off my 2000 and pulled the fuel pickup tube out and cleaned the screen. Before the gauge was marking 1/4 when it was really empty. I could play with the float and when it is down, it reads empty likeit should. I was wondering if the pick up tube should be touching the bottom of the tank or is there a clearance that I should set it too?

Thanks,

F. Flack

The pickup and return lines act like a spring and force the bottom of the "cage" to the bottom of the fuel tank. As long as the upper and lower sections of the cage can move freely, the bottom of the pickup tube should always sit on the bottom of the tank. If you search on the sending unit problem, there have been multiple posts regarding incorrect readings and a couple fixes.

Huff nPuff

Do your self a favour, replace the poorly designed old fuel module with the new improved module pump assy.The old restrictive leaky fuel tank module has been the reason for most of the liftpump and injection pump issues.The old fuel pump and fuel module could barely supply a stock engine with enough fuel.

oscgalis

What improve Fuel Modules?

tmleadr03

F.A.S.S. is one, or just reposition the fuel lift pump from the engine to the gas tank area.

Vulcan

Do you have a P/N for that?

Huff nPuff

No matter how good the FASS is it can't compensate for the restrictions in the tank.If you took one apart you would see what I mean. P.S. I will get and post the the fuel pump module assy. part # as soon as I get it.

Haulin_in_Dixie

Or put a bottom feed on it and cure all your problems. The engine was designed to run that way. I even wonder if there is a lift pump problem with a bottom feed.

Contractor

HID,

Could you elaborate on the bottom feed a little. I am interested.

BTW, I have a 96 3500 you can use. Unfortunately, I and the truck are in Colorado, that and it has about 250K on it, but runs good. Know your in a spot, so if it'll help, she's yours for a loaner.

Thanks,

Cole

Haulin_in_Dixie

Bottom feed... I have the bottom bung that I set up in my pictures. I think it is still there, some were lost. If not I will repost them. To do it you get a bottom bung that will be 1/4 or so off the floor of the tank, even up to 3/8, no problem, it will pickup better than the original, I have run down to 32 gallons on a fill up.

Pull the sender unit, drill the tank under it but enough to the front to miss it, install the bung, hook up the hose, reinstall the sender/pickup unit with the pickup blocked off. Best with the transfer pump, weather stock or FASS, near the bottom level of the tank, self priming.

The tank is over 1/4 inch thick and does not need a gasket as the plastic tank is a large gasket. The bung can be metal, and will seal fine. I brazed a washer under the head of the bung so that it had a larger sealing face.

I have never had a problem or disappointment with mine, one of the best mods I have made.

Vulcan

I'm istalling a bottom feed here in a couple of weeks. I just dropped off the fitting I made to be anodized. I'll post pics when done. I still have to machine the pre filter. I will put a ball valve then pre filter right to the OEM Carter pusher in front of the tank. I'm thinking keeping the Carter always primed with fuel has got to help.

Any thoughts on this?

Huff nPuff

Its complete with wiring harness relay pump replacment block,If you want to increase volume put a new lift pump where the old one was on the engine and power it up with the same wire of the relay that powers up the intank pump.

Huff nPuff

BUT,the only problem I see is when the tank runs low and the fuel sloshes you may pull air.The new module is the only baffle in the tank that stores fuel around the pump,the return fuel also returns to the module to help keep fuel around the pump when the tank is low.

Haulin_in_Dixie

There are millions of 18 wheelers and mid sized trucks out there. Crawl under any one of them and look at the system. Then they designed the Dodge pickup, only with no bottom feed. I have many miles on mine with a bottom feed, never had aproblem, I can even pull more fuel with this setup.

Many on this board claim that the problem that kills the vp and lift pump is the heat from the tank. Now take the return fuel, let it return to a 1/2 gallon tank, also get the fuel pickup from that tank, then allow a small amount of fuel from the main tank to get into the smaller tank. Great fuel heater, the average fuel temperature has to be at radiator temperature, on a hot day that is hot.

And this fuel system in the 1/2 gallon pickup tank is hooked to an engine that was designed for a truck with a limitless supply of cool high volume fuel. The fuel system was designed to comply with passenger car safety standards, not feeding the engine with the proper fuel.

Huff nPuff

I agree with you Haulin Dixie, on the idea of the bottom feed system,For me, hurling my truck down a 1/4mile drag strip regularly.Looking for an edge by running fairly low on fuel,I wanted a way to keep the fuel around the pickup.So I plumbed 5/8in pipe into the stock module from the top.For me this has worked well,even when the tank was really low on fuel,with 1.6 60ft launches.Another thing to think about is,some of these trucks are 4 wheeldrive,you never know what people will do with them,the things engineers have to worry about.