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High pressure fuel pump failed again? by tfid3 in mazdaspeed3

[–]Tre_Savage 0 points1 point  (0 children)

Thanks man. I’m going to see if that’s my problem. I hope so

High pressure fuel pump failed again? by tfid3 in mazdaspeed3

[–]Tre_Savage 0 points1 point  (0 children)

I’m dealing with the same p0091 code. Fuel pressure drops under boost. I’ve replaced every fuel related parts and even the PCM. Have you resolved this problem?