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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?
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.
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