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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > P300 & P304 After timing chain replacement
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      11-06-2024, 02:13 PM   #1
bcromwell
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P300 & P304 After timing chain replacement

Looking for any advice or suggestions. Just did timing chain replacement and after starting the car it idles rough and throws P300/P304 codes.
Tried swapping coils, looked for anything I might have missed. Timing tools all went on and off no problems so I would be surprised if timing was off somehow.
Is there any requirement to do a reset adaptions or specials procedure to clear any air bubbles in the fuel rail/injector?
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      11-06-2024, 04:14 PM   #2
LA1Z24
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Fuel rail will purge itself within 30 seconds. Which timing tool did you use?
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      11-06-2024, 07:47 PM   #3
bcromwell
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Finally figured it out, Call me stupid but it's possible to plug injector 3's cable into injector 4 and vice versa. So after fixing that and resetting adaptations (No sure if it's needed, did it before figured out the other issue) she purrs like a kitten again.
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      11-12-2024, 08:44 PM   #4
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Quote:
Originally Posted by bcromwell View Post
Finally figured it out, Call me stupid but it's possible to plug injector 3's cable into injector 4 and vice versa. So after fixing that and resetting adaptations (No sure if it's needed, did it before figured out the other issue) she purrs like a kitten again.
Curious as well which timing tool you used
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