Engine idles, but backfires

1997 Grand Cherokee with fuel problem. After warming up and on the road the engine will start to cut out. Sounds kinda like it's backfiring under the hood. I have changed the complete fuel pump module (twice), replaced the coil, rotor, regapped the plugs removed the fuel rail and drained and blown air through the fuel line. Nothing has helped. The only fault codes are for the secondary oxygen sensor. When the symptom occurs you can put the gas to the floor and it will shift down, take off and run good until I let off and then it starts to cut out. It does not start until operating temperature is reached. Also, when symptom starts it will not idle. Sometimes after a few minutes at idle it will clear up. I have inspected the fuel lines and there are no kinks or leaks. I also swapped the main fuel pump relay with the horn relay and nothing changed. Please help. Thanks!

Unplugged O2 sensor and problem went away. Knew sensor could effect mpg but did not know it could make a vehicle undriveable. Thanks!

Once in a while my Jeep will lag when I take off and backfire. I have good plugs, clean ir filter, just had an injector service a while ago. What do you think it is?

My 96 jeep will backfire and sputter with no exceleration on pedal untill floored, or I can turn ignition off then back on and it runs normal for a little while, ive changed coil, pvc elbow, wires and plugs, distributer, and gas filter there is no cat converter

Thanks for helping no the check engine light only comes on when starting no cat converter or oxygn sensor, I took it to orilys and computer said oxygen sensor and had another person test it and his said throttle position sensor, new cap aand rotor I drove it from toledo to indy and no problems, new fuel filter, coil plugs and wires, pvc valve its bad now but befor I could turn it off and on while driving and it would work right, or when it starts acting up I can floor it and it runs, it was ideling fine but now it stalls sometime and backfires

My RHD Jeep was imported from Japan. It had a rusty fuel tank, but still put new fuel pump/filter in. Had problems, so put on new fuel tank but used same fuel pump. Had difficult starting without cycling the key, but that problem worked out and vehicle starts fine. Now after several hours of running, it has started stalling and backfiring. Acts like fuel starvation. Mechanic said it sounds like vapor locking, but was not doing it the next day when it had not run for hours. The temperature was 70 degrees and I do not use ethanol. I cannot deal with this as a rural mail carrier and need some trouble shooting ideas for mechanic to try. Does it have to act up before he can diagnose?

I have a 1997 jeep grand cherokee. It is hard to start sometimes and when I get it started it will die on me even going down the road. Than sometimes it will backfire which then will blow my muffler open. I have had the downstream o2 sensor changed the ingnition coil, and computer changed in it and the check engine light still comes on the second day after I get it back from the shop. What else could be the problem?

When I took it to the auto store to have a check ran on it he said that it was the 02-1 senors 2 but I already had one of the o2 sensors changed, would a code show up saying fuel pump or something of that sort. How would I know?

Replaced the cam sensor crank sensor TPS Map sensor fule pressure regulator and did a complete tuneup it sits at an idle perfectly but upon acceleration it sputters and backfires. Im out of ideas

Got code 12

Engine start and idles fine for a few minute idle drops and backfires out of the exhaust. Sometime stalls or clears out like nothing happen. Also happens as driving.