88 gt sd took off stock headers ,h pipe, mufflers
replaced with bbk shortys, O/R h pipe flowmaster and dumps
now the car back fires through the intake falls on its face stumbles sounds like a bowl of cereal snap crackle and pop
pi$$ing me off checked and double checked timing firing order plug wires
car was fine before we did the exhaust up grade what gives man
some one can help just who
thanks
Nitrousd85

 

you crack a porcilen on one of the plugs doing the swap?if the order is right and stuff it would have to be a cracked plug unless one of the gaskets have fallen un front of the exaust ports . your bro has no idea what it could be ?i would say that you guys cracked one of the plugs though