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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N53 misfire under hard acceleration from low revs



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      09-30-2023, 01:49 PM   #1
Mflynn11
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N53 misfire under hard acceleration from low revs

Hi

Put fuel in my N53 330i as normal last night and then went to accelerate up to 40mph and car hesitated and EML light came on and car was then idling rough.

Got the below codes

2B05
0x2B05 nitrogen oxide sensor, heating
29CD
0x29CD combustion misfire, cylinder 1

If I turn car off and back on EML light goes off and car runs fine, gentle acceleration doesn’t cause the issue and higher rev hard acceleration is also fine.

Doesn’t happen when starting the car only under load.

Will swap coil pack over tomorrow to see if it follows but does this sound like an injector or just bad spark plug/coil pack?

Cheers!
Mark
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