I have a 2009 RHD JK that my wife used to deliver mail. Her alternator went bad while on her route, but her post master insisted it was a bad battery. He showed up with a new one and installed it backwards 🤦🏼. Since then I have had a billion electrical issues (jeep won't turn off with key, had to install fuel pump Killswitch). Jeep ran ok for a few weeks after that, then went into limp mode. Figured PCM was fried from polarity on battery being reversed. Replaced PCM, ran great for a week then same thing. Put old PCM back in and same story, great for a week then back to limp mode. Now it will hardly idle and smells like unburnt fuel. No CEL but I have a host of stored codes (C2101, C121C, C123C, U113B, B2305, P1273, C1405). I don't even know where to start here... Any help would be greatly appreciated, as the idiot who messed the jeep up is now threatening my wife's job due to having to call in frequently since this happened. Thanks!