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rpmdiag, Tech and Instructor
Category: BMW
Satisfied Customers: 6725
Experience:  Since 1975
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Fault codes P0301 through P0303 wont go away. I have changed

Customer Question

Fault codes P0301 through P0303 wont go away. I have changed locations of the coils trying to locate problem, however, all appear to be working except cyc 1-3.
Submitted: 9 days ago.
Category: BMW
Expert:  rpmdiag replied 9 days ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 9 days ago.

Check the fuel injectors for proper operation including power to them.

Also check engine compression for a possible valve train issue.

Thanks, Ron

Customer: replied 8 days ago.
I have verified the fuel injectors and the engine compression. All is good.
Expert:  rpmdiag replied 8 days ago.

You're missing something, you can't have good spark fuel and compression and still have a misfire.

Please rate me for my time.



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