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International Automotive Technicians Network
Re: P0300
Posted to Technical Discussion Forum on 1/8/2019

If problem is on the #1 cylinder, concentrate there. Check your plug wire for resistance and make sure you use Delco brand plugs. Cheap plugs and wires cause more trouble than they fix. I have had new plug wires that would not pass a Ohm test because they were... Login to read more.