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p0300 random misfire stumping me
Vehicle has #5 cylinder almost completely dead below 1500 RPM, above this RPM there are no misfires, #4 cylinder also generates a much smaller # of misfires on scanner below this RPM. Have swapped coil packs, ignition wires and replaced spark plugs, misfire s... Login to read more. 
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| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2003 Chevrolet Suburban 1500 LT 5.3L
| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
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