carb help
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 28
Likes: 0
From: Decatur Alabama
carb help
I have a 69 with a 350/300. If it sits a while, it won't start. If I give it a shot of starting fluid it cranks right up and is good for a day or so. After that it won't start again without starting fluid. Any ideas on the possible cause and corrective measures.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
check to see if the fuel is leaking out of or being siphoned off the carb when it sits. Next time out, before starting or anything, remove the air cleaner and look into the air horn and hit the throttle to see if it squirts gas, it should. If it does not then there is no gas in the bowl or the accelerator pump is bad. Either one will make it hard to start.
The bottom ot the thrttle body leaks on some carbs but can be epoxied. Sometimes the valves in the fuel pump are bad and allow the fuel in the fuel line to run back down thru the pump evacuating the carb bowl.
The bottom ot the thrttle body leaks on some carbs but can be epoxied. Sometimes the valves in the fuel pump are bad and allow the fuel in the fuel line to run back down thru the pump evacuating the carb bowl.
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
I've concluded that today's gasoline evaporates quickly in a carb. I run into the same problem on all my carb'd (Q-Jets and Holleys) cars, though, they usually have to sit several days before the fuel bowl dries out here in central TX.
I hate th use starting fluid/spray. Simply pour an ounce or two of gasoline in the carb's fuel bowl through the vent. I have a little bottle for this purpose. Put the air cleaner back on and fire her up.
It's possible that if you're using a q-jet, the fuel bowls are leaking through the Welsh plugs, but I give this a small chance.
FWIW
I hate th use starting fluid/spray. Simply pour an ounce or two of gasoline in the carb's fuel bowl through the vent. I have a little bottle for this purpose. Put the air cleaner back on and fire her up.
It's possible that if you're using a q-jet, the fuel bowls are leaking through the Welsh plugs, but I give this a small chance.
FWIW
Pro
Joined: Apr 2008
Posts: 596
Likes: 6
From: Irving Texas
My bet is that the choke is acting up. Take a zip tie, tie down the choke open and try starting it that way.
As you can tell, I am no fan of the choke......but I'm in Texas.
Chokes and EGR valves were designed by Satan!
As you can tell, I am no fan of the choke......but I'm in Texas.
Chokes and EGR valves were designed by Satan!
