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Just so everyone is aware, the new software for LS turbocharged engines now has a turbo protection feature added. After starting, the engine needs to idle for several seconds to get oil pressure to the turbo before throttling up. If you try to throttle up immediately before there is enough oil...

Common rail fuel system controlled by ECM can only have emissions deleted if someone makes a delete kit for that engine that will fool the ECM into thinking that everything is good by sending false signals to the ECM, instead of the real signals from the sensors. (emulator) Otherwise, the ECM...

That's correct, a diesel can't run rich unless the air filter or intake is restricted, or a turbo failed on a turbocharged engine. Either way, it would cause lots of black smoke. The fuel injection system controls how much fuel it gets, and a common rail injection system with fuel delivery and...

There is no way that 2 hours is normal. There is probably something wrong with the DPF. The older models with Shibaura engines would regen every 4 hours, and now that the company that made EGR valves for LS tier 4 engines has stopped making them, the new stage 5 engines with Kamtech EGR valves...

If EGR and other things have been replaced, the DPF probably needs to be replaced. If it is taken apart and there are brown stains inside, it should be replaced. Coolant getting inside from a leaking EGR cooler will ruin the DPF.