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Low compression hot
This Mazda has lower compression during a running compression test at idle on cyl #4 when the engine is hot compared to when the engine is cold, 65 psi vs 85 psi. The result is a hot engine misfire. I think the valves need to be adjusted. Is there any other lo... Login to read more. 
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36 Replies Received
36 Replies Received
| Engine | 3.7 L |
| Trans | 6-speed Automatic (Electronic) |
Vehicle Data
2008 Mazda CX-9 Grand Touring 3.7L
| Engine | 3.7 L |
| Trans | 6-speed Automatic (Electronic) |
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