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john aka eauto
john aka eauto, The Car Guy
Category: Mazda
Satisfied Customers: 16039
Experience:  ase tech,shop owner
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I have a 2009 Mazda z, l keep getting a miss fire code p301

Customer Question

I have a 2009 Mazda z, l keep getting a miss fire code p301 for cylinder 1. All of the coils and spark plugs have been changed at Mazda the first visit, second visit, the valve gasket, has been changed, third visit fuel injectors, have been tested and passed, fourth visit cylinder compression test and passed. But every time I drive up a hill the engine light blink and I get p301.
Submitted: 7 months ago.
Category: Mazda
Expert:  john aka eauto replied 7 months ago.

Hi . Thank you for asking your question on JustAnswer.

Thank you again for trusting us with your problem. John aka eauto

Expert:  john aka eauto replied 7 months ago.

have they checked the cat?

Customer: replied 7 months ago.
No, what should I check for in the Cat?
Expert:  john aka eauto replied 7 months ago.

to see if its melted down or restricted... any other codes?

Expert:  john aka eauto replied 7 months ago.

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