[Lwells43169]

I have spent 3500 on truck and then 2200 on repairs for misfire in 4 so shop redid the whole side, then new timing chain cause marks weren't visible so I bought a new one. Then new exshaust cause cat was clogged. I took it to shop originally for it shutting off on me rpm would max out then dropped and stall. So now i am at a stopping point it still isn't running right and still shutting off. Pissed upset and sick of being lied to. Oh and both 02 sensor at cat are new. Still pulling codes PO725,PO320,P1391 AND THEN SAYS CATLYST, EVAP, 4 READY MISFIRE FUEL COMP AND 02 HTR. HELP PLEASE

 

[Unkyv]

I had intermittent rough idle and backfiring trouble with a 2001 Durango. Ended up being the injectors.

 

[Burned]

O2 heater code could be wiring to the O2 sensor that's melted from exhaust or cut, corroded....etc.
P1391, P0320 & P0725 is either the crank or cam sensor, their respective wiring, or their respective tone wheels at issue.