1986 dodge w250 fuel side

[w250style86]

Ok i checked to see if i got spark and fuel isnt getting to the engine somehow, so i put a little gas in it cuz it was empty and tried to start it, turns over but does not fire. For some reason the gas rises up on me when i pour it in the tank and i got to wait a little while to fill it up more. I have a 1986 dodge w250. There are 3 fuel lines that come down the frame rail to the fuel tank the smallest one is chopped in half and i dont know where it connects too im assuming its the vent line, it looks like it has the gas feed and return connected, the 2 bigger lines next to it but im not too sure on identifying the lines. At the front of the car by the fuel pump mechanical fuel pump it is feed line connected to the pump then out the pump to the fuel filter and up to the carb is all good even out the side of the fuel filter is connected guessing the fuel return but there is a 3rd hardline at the frame rail with nothing connected to it comes out next to the feed to the fuel pump and the return from the filter. Then i have a missing port line below the gas line inlet to the carb also, pics belowthis is thhe carb right below the fuel line inlet there is a missing port i was wondering what goes there is this some kind of return?


Missing line next to the fuel filter down by the pump coming out of the frame rail what goes there..

cut hose by the fuel tank is this the vent and what does it connect too

My truck isnt getting fuel will these things stop it from getting fuel and running? It looks like its a seperate line from the feed and return

 

[w250style86]

I need to know how all this stuff is hooked up i cant find any pics or schematics i dunno what anything connects too. Just wanted to make sure before i started plugging lines, if this does not get the truck running im plannning on pulling the pump n filter to check them next and possibly dropping the tank cuz its been sitting for a few years

 

[DustyDog99]

Part of the problem might be that screwy fuel filter mopar used. That line on the side is supposed to be a vent line. I junked mine when it gave me problems and went to a 72 dodge dart filter which uses 1 in and 1 out. Most likely if your still not getting fuel then I would check the fuel pump first by disconnecting it from the carb and putting the end in a clear bottle. Crank for 15 sec and see if there is anything in the bottle. If not change the pump an try again. If you do get flow then rebuild or buy a rebuilt carb as the needle is stuck closed. If changing the fuel pump doesn't help the try switching the fuel lines as you may be connected to the vent and not the pickup. The third line is another vent that went to the charcoal canister if you still had that.

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[w250style86]

Do you know where i can find the charcoal canister in the engine bay i cant seem to find it, i looked for pics but cant find any..

Also the top picture is the carb below the gas inlet there is 2 holes that drop straight down then a port end there for like a hose or something anyone know what goes there?

 

[w250style86]

I dont know much about carburetors

 

[w250style86]

Just read up on the carb a little bit and im not too sure if that missing port line on the carb is a vent line too or a return for excess fuel, i didnt know if that being unplugged will mess with my fuel intake or not

It could be some kinda loop system vacume couldnt it? From after the pump... cuz the pump will pull to the fuel pump but not past it and that some kind of return to the tank that draws vacume from the tank side and fuel pump connected to the vent lines? Does that pull gas from the filter up to the carb? Because of the completed loop cycle back to the tank? I figured then the tank would be a sealed vacume from the fuel pump.

Pump pulls from tank to fuel pump
Then
Carb pulls to carb from that missing port line on the carb? Because if the vent lines were all there then it creates a vacume pull of fuel towards the carb? Is that what those missing lines do? Or am i wrong and missing something

Im still trying to figure out this missing port line on the carb

 

[crazzywolfie]

the small line form the tank to the front that is cut is the fuel tank vent. do not plug it. it needs to breath or it can cause issue. medium line should be the return line and the large one is the fuel supply line to the pump. as far as the fuel filter goes the line on the side of it that looks like it might be disconnected on your truck is the return line to the tank. for testing purposes it is probably best to plug it if it isn't already. if you can disconnect the fuel line at the carb it would be a good idea to check and see if there is a fuel filter in the carb input. sometime they clog and would cause a no fuel situation like you are having.

 

[DustyDog99]

I've always hooked the vacuum advance to that front port.

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