Code po300.


Old 07-25-04, 10:35 PM
nelson knowles
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Code po300.

My 1996 chevy 1500 5.7L V8 VORTEC check engine light is on and code po300 is what the scan show, which mean multi misfire on all cylinders do happen at time. What and were should I start first?
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Old 07-26-04, 03:34 AM
Desi501's Avatar
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Location: Boynton Beach Florida
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It means "random misfire", multiple cylinders, not necessarily all of them. The first thing to do is look at the ignition system to see if it is due for plugs, wires and cap and rotor if so equipped. That's the most common cause but not the only one.

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