Did you just purchase the car or other?
Have you or do you know if the car has had the fuel pump replaced and hotwire kit installed?
Give us some more information about the car, and what has recently been done to it.
Could simply be plugs, wires, coil pack, module, wire routing, computer chip for wrong type of fuel, fuel pump going out, mass air flow not working correctly, cam sensor not adjusted correctly, battery cable shorted to pass side header, chip not seated correctly, bad gasoline, ect ect ect.
BW