LOOKIN FOR SOME ADVICE... I HAVE NO IDEA...Replaced cat and downpipe.. hooked everything back up currently it is open right after the downpipe waiting for rest of exhaust to come... started it up and it was blowing smoke and idleing very rough... now it won't even start... Need some help don't want to go to the stealership

 

check my other posts too if you care too... they might give more detail to the problem