Misfire cylinder 3

SantiP · 06-17-2024, 09:07 AM

Hello yall,

I have a bit of a problem. I have a BMW 428i Grand Coupe 2016 and I been getting a misfire in cylinder 3. I changed the sparks plug, coil, fuel injector and still getting the misfire. The misfire happens when I try to accelerate fast. When I drive in eco or slow, it doesn’t happen. Whenever I have the car on and open the tap for the coil, cylinder 1,2,4 react to the tap opening but 3 doesn’t. Need help

JJReam · 03-09-2026, 02:03 PM

Did you resolve your issue? I have a 2014 428xi convertible that's throwing the 303 code and misfiring under hard acceleration. Sounds like the same issue you had.

06-17-2024, 09:07 AM	#1
SantiP Registered 0 Rep 2 Posts Drives: BMW 428i xDrive Grand Coupe Join Date: Jul 2023 Location: New Jersey iTrader: (0) Garage List 2015 BMW 428i xDriv ... [0.00]	Misfire cylinder 3 Hello yall, I have a bit of a problem. I have a BMW 428i Grand Coupe 2016 and I been getting a misfire in cylinder 3. I changed the sparks plug, coil, fuel injector and still getting the misfire. The misfire happens when I try to accelerate fast. When I drive in eco or slow, it doesn’t happen. Whenever I have the car on and open the tap for the coil, cylinder 1,2,4 react to the tap opening but 3 doesn’t. Need help Attached Images
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03-09-2026, 02:03 PM	#2
JJReam Registered 0 Rep 1 Posts Drives: 2024 X7 4.0, 2014 428xi Conv. Join Date: Mar 2026 Location: Emporium, PA iTrader: (0)	Did you resolve your issue? I have a 2014 428xi convertible that's throwing the 303 code and misfiring under hard acceleration. Sounds like the same issue you had.
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