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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Mis-firing when warm



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      12-13-2017, 11:48 AM   #23
whitelightning
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Any update on this? I am headed down this same path with similar symptoms.
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      12-13-2017, 09:01 PM   #24
torrque
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Hi; mine is experiencing a similar issue, no codes, and heavy bucking, or shutdown. My rpm's drop to zero when the shutdown happens, and recover in split second. No codes either.
It has new injectors, plugs, coil packs, both fuel pumps, battery, alternator, walnut blast done. I will report back, but mine is an electrical issue... do some logging and monitor fuel pwm , battery voltage and o2 sensors voltage, see what you get when misfire happens.
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      12-14-2017, 09:21 PM   #25
=C=
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Quote:
Originally Posted by rialnet View Post
MOSFETS done, no change.... into BMW we go :-(
Can you send / PM me info on how to check and replace the MOSFETS on a 335i 2007?
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      12-15-2017, 12:04 PM   #26
torrque
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Quote:
Originally Posted by =C= View Post
Can you send / PM me info on how to check and replace the MOSFETS on a 335i 2007?


and here are the mosfets :

https://www.digikey.com/product-deta...MCT-ND/1566830

and one more thing, as an FYI, I swapped the whole DME with a MSD81, and my problem is exactly the same. I ran out of time and good weather (don't have a garage) so I took the car to a BMW shop...
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      12-16-2017, 04:00 AM   #27
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Quote:
Originally Posted by torrque View Post


and here are the mosfets :

https://www.digikey.com/product-deta...MCT-ND/1566830

and one more thing, as an FYI, I swapped the whole DME with a MSD81, and my problem is exactly the same. I ran out of time and good weather (don't have a garage) so I took the car to a BMW shop...
Thanks, I checked all my MOSFETS and they're OK.

This is odd...
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