[Chrysler300] spark plugs

[james mcmullan <macthehammer@xxxxxxxxxxxxx>]

As a general rule.You want to run the coldest plug you can without fouling.They don't even sell plugs by heat range any more,because of the modern ing.In champion From cold J14-(J4, J12)-(J5,J11)-(J8,H10)-(J7,J9)-H9 com.Hot. I have specks on A.C_Auto Lite_Blue Crown ,If anyone has a need.If you are ruining solid wire you need re aster plugs( res tor wire straight plugs).Install plugs and run it under load ,pull a plug and read it .You are looking for a light tan.Black is oil fouled or to rich or to cold a plug. White is to lean or too hot a plug. Sorry about the watter clock .But there are young ones out there that don't know this stuff.Jim McMullan 300 F Calif.

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