Cold temps issues

[straightlinespeed]

When its cooler out, or just plain cold... The couple of times I've started my car, it does not like the cold weather. The choke is working fine, but I have to feather the throttle to keep it running. Im running a QFT 750 Carb on my 360 with a air gap and magnum heads. Where should I look or do to cure this issue?

 

[jdsduster]

mine is the same way.corse i dont drive it in the winter,but i just play with the throttle until its warmed up

 

[straightlinespeed]

I dont drive mine in the winter either, but late fall and early spring when the temp is in the 50's. I feel I would have to sit in the car until it is up to operating temp for it to be normal.

Late last fall I took it out and every time I let off the gas it died. It would start up right away but die when I let off the gas again. Just hoping to cure this annoying issue.

 

[mderoy340]

An air gap does not work well in cold climates until the engine is at full operating temp. Some heat is needed to help the fuel to atomize.
In FL I run all my carbs without a choke. Idle AFR at start up is 16.5:1on the wideband. Once up to operating temp it settles in at 13.2

 

[AJ/FormS]

If the outside temp is afew degrees either side of freezing, and the humidity is just right, the carb may/will experience icing.
FWIW extra timing cures mine. I have a dial-back Spark control, dash mounted.
My AG/Holley is good to Zero*C/+32F, Maybe a bit less.

 

[1968FormulaS340]

Get rid of the air gap and get the non air gap performer rpm.

 

[straightlinespeed]

Thanks again guys. I didnt even think about the air gap being part of the problem.. Guess, the car will only come out when its on the warmer side.