My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather. When cold weather set in, it still works fine after a complete warm up. Trying to move the car before a ten minute warm up results in the engine stalling and sputtering. By pumping the gas vigorously, the car will accelerate after sputtering a bit. Each time I barely touch the accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The warm air valve on the air cleaner doesn't work at this time and I am having trouble finding a new one.- posted
18 years ago