help to troubleshoot misfire on N62TU
Hey guys I need some directions on how to troubleshoot the misfire on my wife's 550i. Periodically I get check engine light with 29CE and 29CC errors.
I have checked the spark plug on cylinder 2 and ingition coil. No issues were noted and no oil on the spark plug. I have swapped spark plug and ignition coil on cylinder 1 and 2. Today my wife started the car and it had a really rough idle with 29CE and 29CC errors thrown. Since the problem didn't follow the spark plug/ignition coil I can conclude it is not ignition coil/spark plug related. What should be my next step? This issue is pretty rare and seems to happened only on cold start. I drove the car to work today and no problem with idling. I have BMW diagnostic software (inpa, rheingold...). The car mileage is right under 40k miles. |
Originally Posted by tpaxadpom
(Post 1594254)
Hey guys I need some directions on how to troubleshoot the misfire on my wife's 550i. Periodically I get check engine light with 29CE and 29CC errors.
I have checked the spark plug on cylinder 2 and ingition coil. No issues were noted and no oil on the spark plug. I have swapped spark plug and ignition coil on cylinder 1 and 2. Today my wife started the car and it had a really rough idle with 29CE and 29CC errors thrown. Since the problem didn't follow the spark plug/ignition coil I can conclude it is not ignition coil/spark plug related. What should be my next step? This issue is pretty rare and seems to happened only on cold start. I drove the car to work today and no problem with idling. I have BMW diagnostic software (inpa, rheingold...). The car mileage is right under 40k miles. |
Originally Posted by Gee_115
(Post 1594269)
Could be the fuel injector. Not sure exactly how you diagnose that without taking it out. Fuel injector shouldn't go bad at 40k though.
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Originally Posted by tpaxadpom
(Post 1594276)
Thank you. I agree fuel injectors used on N62TU seemed to be pretty solid comparing to those used on N54 and other turbocharged motors. I wonder if CCV can cause this, the strange thing is that it is only cylinder 2 that is throwing the error and it happens very rarely.
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