2004 mazda MPV missing badly at idle in gear cylinder 1 missing
Missing badly when stoped on gear. Had codes checked and they are HO2S 11 and HO2S 11. I'm thinking fuel pump but I can't find the test valve and not sure what the pressure should be.It has 88000 miles.I could be wrong thinking this but it is listed on both codes.I'm thinking if not pump it could be mass air flow sensor. any help would be great. Thanks Rick jerking at idling slow accerating. cylinder #1 is missing.
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Sounds like possibly a coil starting to break down and fail. If the check engine light is on it would be fairly easy to retrieve trouble codes which could help identify the cylinder or cylinders that are. It working.
Sounds like it is missing badly and would not be so noticeable when running. Have you had it tuned up lately? Could be wires and plugs need replacing. Also if you have a lot of miles on the engine the compression in the cylinders may be low. Two possibilities.
Pull all your plugs (one at a time and replace afterwards) and make note of any plugs that maybe black or wet. Do a compression test on those cylinders. You made the plugs hotter with the new coil but the potential flooding amy have just caught up. If this is any help, please check good or fixya. Tahnk you