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2009 MS3 CEL P0303
The current plugs are newer and gapped correctly and are not amazon sourced. I also swapped plugs to different cylinders and the problem stayed on cylinder 3. Did a compression test and the compression is within normal ranges on all cylinders. Check fuel pressure as well and they are all...- ChadG
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- Forum: Mazdaspeed 3 Troubleshooting
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2009 MS3 CEL P0303
Year/Make/Model: 2009 mazda mazdaspeed3 Mileage: 123800 Location: Norco, CA Concern: Car is running fine but throwing a CEL for a cylinder 3 misfire DTC's: P0303 Modifications: none ECU/Tuning Software: none Tuner: none Is the concern intermittent? No Can you duplicate the concern? Yes (CEL is...- ChadG
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- mazda mazdaspeed mazdaspeed3 ms3 p0303 speed3
- Replies: 4
- Forum: Mazdaspeed 3 Troubleshooting