Thread: P0340 code
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Old 10-02-2019, 10:06 PM   #18
Jon Boy
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Join Date: Jul 2007
Location: Utah
Posts: 177

2001 SC2
Default Re: P0340 code

I literally just replaced the plugs on Saturday with copper Delco plugs. It ran fine for a day and then started misfiring again. The wires tested within spec too.

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