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Hello and thank you for your question,Can you tell me what your working on, year, make and Model as we as engine size?
Have you scanned the computer to see if there are any fault codes and if so what are they?Where was the fire and the extent of the damage?
When you say its dumping fuel are you saying its running rich on bank one?Was the harness damaged in the fire?
I would suspect you may have damaged the PCM (computer) if the wiring was burned providing you have properly rewired and repaired the damaged harness. I would start with checking the injector pulse on all 3 cylinder on the bank that dumping fuel to make sure the injectors are pulsing and not holding open. You can check the injector pulse on each cylinder with a standard 12 volt test light by placing the test end on the power side of the injectors and the ground end on the other wire and crank and start the engine. If you have normal pulse the light should flash. I the light stays lit then that would mean the PCM is keeping the injectors open. Check this and let me know the results.
The ECM and the PCM are the same thing and if they have replaced it and its not defective then I would have them recheck there wiring repair. Its very likely something was overlooked.
It not likely a fuse concern if it starts and runs, it is a possibility the injectors are the problem but not likely because they are bad. I suspect you have either a wiring problem and or the signal to the injector or even a defective replacement PCM.
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