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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Codes P0300, P0303, & P0304



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      12-22-2013, 07:43 AM   #1
wdlfbio
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So, I'm getting on the freeway, hit the throttle hard to pick up speed, and I get the reduced power display and SES light. Limp her home and plugged in the code reader. Cylinders 3&4 are misfiring. Already have an appt at BMW for Thursday, but I'm wondering if there are some common fixes other than bad coils or plugs? Loose wires? Which are cylinders 3&4?
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      12-24-2013, 08:37 PM   #2
Basil335i
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It's your coils I had that problem too I switched out coil number 1 4 6 so far and the other ones are fine
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      12-25-2013, 01:05 AM   #3
wdlfbio
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It's going to be fun driving it 25 miles to the dealer Thursday morning... I hate getting passed by every other car on the road
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      01-21-2014, 10:26 PM   #4
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Did you ever get this resolved? I just got codes P0303, P0305, P0302 & P0300 this morning, car barely runs. I'm guessing its the coils but I'm having a hard time believing 3 of them went out at the same time. I would swap the coils to test but the weather has been terrible this week and my car is parked outside.
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      01-22-2014, 06:51 PM   #5
wdlfbio
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Yeah, they actually found an intake leak and had to replace a gasket. I'll try to find the service slip and see exactly what it was.
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      06-23-2021, 03:21 PM   #6
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Hi,
Any conclusion what caused the troubles?
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