AscolA

Hey guys,

My car starts right up when cold. I rebuilt the carb and upgraded the ignition last year. The car can sit for weeks and it will fire right up. However, when I drive it around and make a stop, I'll go to start the car when the engine is still warm it will stall when I put it into drive. I'll have to rev it a few times and it still wants to stall until I get going. Any ideas why it does this?

Thanks

ky

our carbd cars used to do that but our prblem was cause the carb was dumping fuel into the engine after we shut it off. itd flood pretty much.

but idk why itd stall.

AscolA

Any one else have a similar problem???

jwog666

choke sticking on maybe?

ky

you have 1 too many spokes on your wheels

67mustang302

Heat soak.

AscolA

what is heat soak?

AscolA

bump

ky

adjust the accelerator pump.

67mustang302

Car sits, heat that normally is carried away in a continuous even manner by the circulating coolant, and air/fuel moving through the intake, now conducts slowly throughout the engine. Given enough time that heat migrates from the head just above the combustion chamber(which is VERY hot) into the intake and carb, the fuel gets hot and it's density decreases causing a leaner a/f ratio, and when you start it back up you now have a bunch of extra heat in the intake/carb/fuel with a lean afr that throws off combustion and the engine runs rough/poorly. Heat soak. One of the downsides to a carb, but usually if you hold the rpm up for a few moments it evens out. That causes larger amounts of fuel to move through the intake than at idle, the fuel being mostly liquid conducts heat out of the intake, and it also lets some of the cooler fuel from the fuel system get into the carb to get the afr correct. Extreme cases lead to evaporation of the fuel from the carb. You could try an insulating spacer.