ECM-4400 Stepper motor or DFCO?

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ECM-4400 Stepper motor or DFCO?

LPG, CNG & LNG - General Info and Issues Share experiences and problems

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Jun 5th, 2024, 07:54	#1
mcfe Junior Member Last Online: Aug 24th, 2024 19:49 Join Date: Apr 2019 Location: NoTown	ECM-4400 Stepper motor or DFCO? Recently my CNG stopped working(no reaction from button). I got error code ECM-4400. I opened my stepper motor and resoldered the joints and lubricated the piston, however this did not fix the issue. It worked for 10-20 meters and shut down immediately while I was driving. But apparently there were 4 more joints in the stepper. It's either fuel shut-off valve(DFCO?) or stepper motor is going bad elsewhere. I would be happy if someone has ideas I can try. Last edited by mcfe; Jun 5th, 2024 at 08:00.

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