i picked up a 66 mustang a couple weeks ago. i test drove it and it seemed to drive decent, wasnt too worried for the price and the rest of the package but decent for a car that i can only guess that it probably hasnt been rebuilt any time in the last decade or two if ever. well after if sat for the last two weeks i went to pick it up from my buddy's house to work on it, turned the key to on, pumped the pedal, turned key and instantly fired up, i was surprised and pleased, then when i started driving it if i hit the throttle too hard it choked for a second or two then takes off. then when i stopped to get gas and every other time i went to start it up it took a while to get it to catch. i know its 44 years old and its not my first carburated(spl?) car so i know its not going to just turn key and start everytime like FI. just seemed excessive, i remember something about there being a reservoir in a carb that is supposed to dump when you hit the gas to have gas there and ready until the fuel pump can catch up. anyone have any words of advice. its not my biggest concern, im fixing some rust and body work first but just seeing if anyone can help. thanks in advanced and sorry for the long post to get to a small question

 

What carb, engine, trans do you have?

 

Sounds likely a problem with the accelerator system. The little pump on the front of the carb provides fuel to two little squirters on top of the primary venturis. With the engine off, hold the choke plate open and pump the gas a couple of times. You should see two little squirts shoot down the venturis.

 

i knew i forgot something, was tired, it has a 289 and a holley 4 barrel, not sure which one, it was originally a 2 barrel car and someone put the holley on it.

 

do what 2+2 says and if it's a holley and you do get fuel there, then check the accellerator pump linkage. it has to have no play (where the screw with the spring is) in idle. otherwise open it up a bit using the screw. and with Throttle wide open make sure the pump lever goes a bit further than the linkage can press it in (you should be abler to shove a half millimeter feeler gauge in there)