ok so i have an 84 camaro 5.0 with an edelbrock carb, i took a trip across the state i was about 5 hours in when i refilled the gas i tryed to turn it on and it wouldnt start it would roll over but not start well about an hour or so it started right up later on i was speeding and i refilled the gas and same thing it did it one more time, i have no clue what the problem is

 

my guess it 's vapor locking.

Vapor lock is a problem that mostly affects gasoline-fueled internal combustion engines. It occurs when the liquid fuel changes state from liquid to gas while still in the fuel delivery system. After time to cool off, all is normal.

 

Is your in-tank pusher pump working? does yours even have one? It was a dealer mod they did to help prevent vapor lock.

 

I forgot about the mod Ozz. Good catch!

 

it doesnt have an in tank pump and i look at the carb and its still getting gas a full stream of it, i used to have a mustang with vapor lock all i would do was keep the gas pedal pushed to drive it and this wont even try

 

The fuel gets hot in the intake and carb and bubbles off. It's part of the whole vapor lock. My granddads old Lincoln does it.

If you have true vapor lock, you won't be able to push through it because of the air in the lines.

But, it does try and crank over when won't start right?

 

ok yes it does i hear it roll over but nothing

 

Your starter is getting hot and not activating? Iv heard of that being a problem if you have headers.

 

Nvm if it cranks, not the problem

 

2 ways to combat vapor lock shown on an a fancy engine from the C2 site. First is a heat plate under the carb. And second is the metal return fuel line with a dribble hole at its connection to the fuel supply. That small hard line is connected to the existing return line down on the frame. If the mechanical pump has a return....it should be capped off.

 

So, the small hard line has a small properly-sized orifice on the leaving side of the blue anodized tee to allow venting of air-bound non-liquid gasoline vapor back to the gas tank?

What size should the dribble hole be?(assuming approx 6 lbs pressure)

The blue tee with a small hole acts as a kind of regulator/vent back to the tank then?

Heat soak and fuel percolation seems to be a chronic problem with these carb'd 3rd gens, Thanks.

 

Could be your carb has a internal leak and is flooding out the engine
when shut off hot. When it sits/cools for a bit the gas evaporates
and it starts right up.

Possibly a float issue?

I thought only the HO motors has both a in tank and block fuel pump?

 

.060" hole.
http://www.corvetteforum.com/forums/...d-by-lars.html

 

Had a boat with a Chevy motor. Had the same problem. Turned out to be the coil. Not familiar with your engine, but if you have a single coil that leads to the distributor, that could be the problem. When they go bad, they will swell (internally) and short out when they're hot. After they cool down, you can start it again. They will manage to keep enough juice flowing one the engine's hot and running, but not enough to start it.

 

1/2 inch plastic carb spacer will probably cure your problem......look on ebay under $25.....it fixed mine.....