I have a 94 mustang gt with 122000 miles. It has bbk headers and exhaust and mild cam. Bought this car running like crap. Thought it was plugs and wires. Changed the plugs wires cap and retimed it. Not it. It ran like it was missing on two cylinders. Put new injectors in and runs great. But not all there yet. The header that connects to the exhaust. The bolts r missing. So its not hooked up. Will this cause the car to not have the power it should. Need some help and info what to do