Well it just started tuesday .i cleaned my injectors changed plugs,wires and coil fuel pump is fairly new .it idles rough with a back fire eveynow and then but when i drive off from 1st it sputters and backfires and then it may just cut off .could it be the fuel pump or could bad o2's be the problem .oh i have a dohc r/t with cai ,mopar pcm ,atb,chikara headers.with the pcm could bad gas cause the problem?

 

You are using 93 octang w/ the pcm...right? it requires 93 due to it's different timing and fuel map.

 

yes.whats funny is it just all of a sudden happened .it seemed to get worse after i put on the new coil and wires

 

usally this happens when you get unburnt fuel into the exhaust (rich mixture), but its call afterfire when it goes out the tail pipe. Backfire is when it spits fire out the intake.O2 sensors could be the issue.

 

Do you have a rattle from the cat converter when you shift? I did for awhile and it would backfire every now and then. Cat was going bad on me.

 

Pull the plugs and check the plug gap?

 

no rattle.i have a test pipe insted of cat. i ended up replacing every thing i could think of from injectors to fuel pump ,plugs, wires,coil but not the o2s it runs fine it just idles to a lope an to the point of cut until i give it a little gas .but when i take off i get a sputter an then a backfire.after that drives fine.after all the parts got back a little more hp.could o2s be the problem

 

TB could be sticking. Take it off and give it a good cleaning.

 

when i swapped out the pcm with the mopar one should i use the recomended gap or should the plugs be gapped different

 

Same gap at 0.035"