trying to fire the motor----No Fuel

[mtnman210]

So I'm trying to geth the bog ol' caddy going in the project but it just want fire up. Now I know 100% that it runs. I drove the truck it came out, swapped the motor into the project and now nothing. I can make it run dumping gas down the carb but it only goes until it burns up the gas. I do have a clear filter between the pump and the carb and I get no gas in there. So Obviously the pump isn't pumping. I need to problem solve this in the morning. I'm guess one of the lines has to be wrong but what else could I look for.

I have 4 lines coming from the tank: I'm guesing 1.) feed 2.) return 3.) breather 4.) breather for the filler neck

and at teh pump I have 2 lines again I'm guessing: 1.) from tank in to pump 2.) out of pump to carb 3.) return to tank

Also I thought about just forgetting the mechanical pump all together and swaping in an electric but they only have 1inlet and 1outlet. Can I run it without the return

 

[Fordum]

Return line? You don't normally use a return line on a carb setup do you?
Sounds like you have put a carb engine into a fuel injected vehicle. If so, you have some more work to do.

 

[mtnman210]

nope didn't do that. 77k5 wasn't ever fuel injected. The return line eas to help prevent vapor locking and also a safety thing so if the pump broke the fuel would drain back to the tank.

 

[76zimmer]

Return line? You don't normally use a return line on a carb setup do you?
Sounds like you have put a carb engine into a fuel injected vehicle. If so, you have some more work to do.

some GM engines did have a return fuel line, on a carb'd engine.

 

[mtnman210]

Got it I had the feed line hooked up wrong