intermittently dies at idle and backfires

[Geff McCarthy]

Perioldically, my 63 Fury 400 dies at idle and refuses to run for 5-15 min, then cures itself. It will only run with rapid accel pump shots. did it today on the way to have my new vert top installed!
I don't think it is vapor lock, as the temp in PDX this am was 70! My fuel pressure gauge acts curiously: sometimes on shut down it reads 0, other times it holds the set pressure, and even decreases the hold pressure when I change the setting. Could it be carb floats? I assume when the bowls are full, the intake valves are closed, and the line pressure is maintained. I think the timing is ok at maybe 15-35. The carb is an Eddy 650 which i rebuilt twice. Any help greatly appreciated.

 

[RJRENTON]

Perioldically, my 63 Fury 400 dies at idle and refuses to run for 5-15 min, then cures itself. It will only run with rapid accel pump shots. did it today on the way to have my new vert top installed!
I don't think it is vapor lock, as the temp in PDX this am was 70! My fuel pressure gauge acts curiously: sometimes on shut down it reads 0, other times it holds the set pressure, and even decreases the hold pressure when I change the setting. Could it be carb floats? I assume when the bowls are full, the intake valves are closed, and the line pressure is maintained. I think the timing is ok at maybe 15-35. The carb is an Eddy 650 which i rebuilt twice. Any help greatly appreciated.

Change the coil and if still equipped with points/con denser, replace the condenser too. BTW....what engine?
BOB RENTON

 

[Geff McCarthy]

thanks, Bob will do ASAP. It has the replacement MOPAR orange electronic ign. Truck 400, low compression I think.

 

[AR67GTX]

Probably as Bob suggested. I once leaned out the jetting in the carb on my Corvette too much and it started randomly backfiring through the carb at idle or when trying to take off from a stop. Just throwing that out in case you have played with the jets recently.

 

[Geff McCarthy]

Thanks, GTX. I like your mantra, too. I once met Mandiba's personal pilot, who was also a Flight Surgeon. Wonderful stories of the Great Man.

 

[Geoff 2]

Check to see if the carb is has fuel. Next time it stalls, operate the throttle while watching that the acc pump nozzle squirts a shot of fuel into each primary barrel.