i had a vafc in my car but i took it out bc im trading my car in. well i was told to cut the harness out and it would run fine so i did but now the car back fires runs rick and studders when you hit the gas. what do i have to do to get it running right again. can somebody come help me out in fixin the car.

 

if you just cut the vafc harness, than the input wires for the map and pressure sensors are not getting a reading and your shit is just going haywire, you need to put the original wires on the stock harness back together.