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Username Post: Engine issue
Levaughn
Poster
Posts 16
10-08-18 07:57 AM - Post#2748130    

I’m trying to help a friend diagnosis a problem with his car starting and shutting off. It’s a 1974 Caprice with a 1970 Camaro motor 350, Victor Jr intake with an Edelbrock carburetor. He purchased the car from someone and had it shipped to him not knowing anything about the engine (He wanted a convertible) When he first got the car it would run. Now it won’t bring fuel up to the carburetor. I replaced the fuel pump, blew compressed air into the fuel line and can feel air coming out of the gas tank. Once I connected the fuel line to the pump, the clear fuel filter showed gas coming up to the carburetor while cranking and it started. The car ran for a short while and then shut off. I noticed there was no fuel in the filter even after to trying to start it numerous times. Right in front of the fuel pump is what I think is the return line from the tank that is not hooked up to anything. With his engine set up, would it be necessary to have the return line hooked up and if so, where would the line go to? I’m thinking that it might be the issue. Any help would be appreciated. Thanks in advance.
Shepherd
Frequent Contributor
Posts 1910
10-08-18 01:14 PM - Post#2748157    

What do you mean a line in front of the fuel pump?,where is it connected to or from?
Levaughn
Poster
Posts 16
10-08-18 01:56 PM - Post#2748162    

I mean't to say the line from the tank running along the passenger fender well. The is coming from the tank running along the passenger fender well.
Shepherd
Frequent Contributor
Posts 1910
10-09-18 04:12 AM - Post#2748205    

Well if it is actually the return line it should still run without being connected. How about a worn fuel pump push rod, unusual, but possible.
Levaughn
Poster
Posts 16
10-09-18 01:20 PM - Post#2748248    

Thanks for the response. I looked at the rod and it didn't seem to have any visible issues. The owner said he used to start it and let it run till he felt like shutting it off, then it wouldn't start anymore. He said another friend before me got the car to start by blowing into the fuel line going back to the tank. I did the same thing. It ran about a minute then shut off.
Shepherd
Frequent Contributor
Posts 1910
10-09-18 03:28 PM - Post#2748267    

Pretty sure there is a sock type filter on the end of the fuel line, maybe some junk in the tank clogs it up after a few minutes running.
Levaughn
Poster
Posts 16
10-09-18 04:15 PM - Post#2748275    

Thanks. My last resort is to drop the tank.
GMMark
Poster
Posts 6
11-23-18 02:45 PM - Post#2752216    

Remove the gas cap and try it
Texasray
"4th Year" Gold Supporting Member
Posts 103
Texasray
11-15-19 06:50 PM - Post#2780254    

Yes, make sure it is not building a vacuum.

Sam
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