hi all . I just bought a 92 mustang that has a bad surging problem and some times car turns off . when turning ac on car shuts off right away at idle. every once in a while car will not serg and run good but when it does serg car looks like it runs rich with a lot of smoke coming out the fuel gauge on car says about 35 psi and goes up and down as it serges . I have changed the iac. egr .tbs. and the pcv valve and still nothing does any one have any ideas that might help . car has holly aluminum heads that where ported and upper and lower thplon mainifold

 

check for vaccum leaks and what maf and inj's does it have?? stock cam??

 

it has a e303 cam 24lbs injectors and bbk mass ais flow sensor calibrated for 24lbs injectors

 

check for vaccum leaks also, I use a smoke machine to leave no doubt