I have a 1966 Mustang, strait six.

When i turn the key the car starts right up, in N i can rev the engine and there is no problem. Once i put the car in gear ( D or R) it is fine, but the second i try to give it gas to go the engine just dies....

What Wrong?

 

Could be many things. Can you get it to go if you press the gas slowly?

 

Could be accel pump not working properly.

 

brain dead q but....you are allowing the car to warm up right? if you put it into d/r does the idle seem to drop to a really low lope or same as in N?