HELP ok im a blue name now you can reply 78 big ten no start

[old Rusty C10]

Now that ive taken care of site business, I am going to attempt to help with your issue on the truck.

Is it possible any of the fuel lines are jammed or bend so that fuel is impeded from reaching the pump or carb?

On the tank are you sure that the pickup part of the float is sitting in gasoline. Ive run my tanks empty and there should only be a cup or so of gas i n there that doesnt get sucked into the fuel system. 3 gallons of gas should get you started and to the gas station a couple of times

Next thing i think you need to check and re check is did you install the fuel pump correctly that the cam is moving the pump correctly? If you didnt the pump is n ot pumping and the gas wont reach the carb.

If the truck is running on starting fluid it is definately fuel delivery related

[Hubscrub]

i agree the fuel line could be clogged between the tank and pump i have had this happen to me before when the engine wasn't getting fuel.

[Sillyoldman]

I'm just guessing the line in & out of the pump connected backwards or the pump itself has a bad diaphram.

[1LowToy]

Place Vacuum gauge on the inlet side of your fuel pump. Turn the motor over a couple of times. You should have a vacuum reading. If no reading or it drops to zero the pump took a dump. While the fuel line is off the pump apply pressure to the fuel inlet to the tank (about 3psi or your tank will get real big, you don't want that). That will let you know that your fuel tank screen is good and your hoses are on the tank correctly. Be sure that your lines to the tank fit snugly because if the inlet line has an opening you will not get enough vacuum to pick up fuel. I don't know of the fuel and vapor lines can be reversed, but if you had the tank out???? I have had a new fuel filter not allow fuel into the carburator as it had a rubber check flap on it and it would not let the fuel by it.

Good luck and let us know what you find.

[budget78gmc]

Had the same problem. Cracked fuel line off the tank. Changed it dumped gas and she fired right up.

[198ChevyGuy]

Hey budget our trucks almost would have been twinkies, Except mine had severe Fading and was well if you have seen the pics you will understand.

Ok to the topic at hand I blew into tank and it got big. I have a neighbor letting me use a airtank and nozzle to blow the lines out. and im going to get a aftermarket plastic bodied filter tomorrow, Make it easier to see. And along with that im going to try the gas can idea aswell. I cant wait to get this dang ole thing on the road. Side note if your in tulsa and needing door pins dont go to the orilleys on admiral..... The sooo sold me the wrong ones twice. Also once i get it running does anyone know a salvage that i could get the ducting for the heater?

[198ChevyGuy]

You think if i hooked a air compressor up and wrapped a rag around it put in fuel nozzel inlet and blew would it possibly prime aswell

[198ChevyGuy]

or would it blow out the diaphram

[panhandler62]

Originally Posted by budget78gmc

Had the same problem. Cracked fuel line off the tank. Changed it dumped gas and she fired right up.

That's my bet. I recently had a problem like that with the onboard generator on my RV. a small crack in the fuel line was keeping the fuel pump from being able to draw a vacume.

Fixed that and it was golden.

Disconnect each line and cap the end. Test the line to see if it holds vacume or if it leaks air. Idealy; use a vacume gauge but you can probably get away with a good old backyard suck on the line if you have to. There isn't much volume even in lng fuel lines so you can evacuate them and see if they stay that way pretty easily.

WARNING -- do not skip the disconnect and cap part or you will get an unpleasent suprise!

[198ChevyGuy]

I know the gas tastes soooo yummy

[monte0185]

You mentioned in your first post that you manually pumped the fuel pump with the line attached and it pumped fuel. At least thats the way I understood it. If thats the case then Id say your fuel pump cam lobe has been wiped out. Try an electric pump in line that may fix your issue. They can be had at any parts store fairly cheap. It only has to pump 4-7psi so a cheap one will work. I keep one around just for this.

[terryj]

I'm just going to suggest that maybe, just maybe, your fuel line in the tank is plugged, truck this old can accumlate allot of crap in the tank.

[198ChevyGuy]

Originally Posted by monte0185

You mentioned in your first post that you manually pumped the fuel pump with the line attached and it pumped fuel. At least thats the way I understood it. If thats the case then Id say your fuel pump cam lobe has been wiped out. Try an electric pump in line that may fix your issue. They can be had at any parts store fairly cheap. It only has to pump 4-7psi so a cheap one will work. I keep one around just for this.

That was the old pump. Replaced it with new mechanical pump.

[monte0185]

Originally Posted by 198ChevyGuy

That was the old pump. Replaced it with new mechanical pump.

The problem may be though that the pump is not being driven enough by the cam to pump either the old one or new one.

Unless your trying to say you had an electrical one in the tank and instead of replacing it you just added a mechanical one? Dont think thats the case but just to clarify for everyone.

[motornut]

can you siphon from the tank?
either with a extra hose to a can or
useing the hose leading to the carb
I've bought no start cars with broken gas lines(sending units)
lol can you blow bubbles back into the tank(would mean u have enough gas to suck if you hear bubbles

[79gmcc15]

What did you use to hold the pump rod up to put on the pump? If you used a bolt on the front. Then maybe you didn't take it out?
Posted via Mobile Device

[198ChevyGuy]

Well guys guess what. I got her started, I woke up and found my gas soaking into my driveway. Apparently I had unpatched part of the tank putting it in.... grrrr. So i Decided i was fed up with Pulling the tank, So i took it down one last time with vengance. Took a grinder and took it down to metal all over, Then prepped it for a more suiting fix. Soaked the inside with Jasco (rust neutralizer) Then i washed her out got as much flakes as i could out. Followed by Mixing up 2 cans of Bondo Glass. Applyed all that i could to the tank everywhere it could leak from. Its a Patch that Wont disapoint me. THen i sanded and primed it, Following up by shooting it with Import red rattle can(left over from my 84 celica). Shes water tight now . I also trimmed the hoses and hooked up a new Ground wire to the tank, Blew out the lines which were not clogged, And Reinstalled the tank, And after priming the carb it ran for 2 minutes, Died then i had to crank it for about 15 seconds. And Wamo She fired up and has ever since. I managed to get to Advanced on Admiral 7 minutes before they closed and bought a new filter some Trans fluid, And a new headlight. Silverstar headlights now, The only problem is i dont have hi beam with them. Any ideas there? I Found out that the Adjust screws for the headlights are also broken, And or missing. So its cockeyed going down the street. After that i took her all the way to Jenks and back.

Does anyone know a low cost conversion kit for Th350 to Th400? That brake light being on all the time is really annoying. And i Also have no spedo due to the trans swap. I could use some solutions there aswell. I am now Driving her with no issues, Except for the one time at a stop light i had to rehook the Shift linkage due to missing cotter pin.
I have a Very very sensitive gas pedal, Have to be careful not to squall the tires when accelerating, Even at 40 mph it broke loose. This truck has some good potential now. Can't Wait to meet any of yall. Think im going to lay down an Emerald Green Candy and Flat black Next. Well other than all the Minor fixes, Like the vent window, Heat ducts, And radio.

[198ChevyGuy]

Originally Posted by 79gmcc15

What did you use to hold the pump rod up to put on the pump? If you used a bolt on the front. Then maybe you didn't take it out?
Posted via Mobile Device

I used one hell of a strong magnet, The only issue was getting it back out.