Failing to provide the correct injector Trim Code to the ECM could lead to problems such as lack of power, bad fuel ecoomy, or even DPF blockage. How can you know if your Cummins engine needs Trim Codes? How can you update the Trim Codes following an injector swap?
Some engine manufacturers such as Cummins, use injectors without connector plugs or with unmarked terminals. If this is the case, how should we connect the cables on the injector? Will the ECU show injector faults if we reverse the polarity? Does injector polarity matter?