P1201 to P1206 are misfiring from cylinder 1 to six. P1300 is random misfiring. It does not indicate a fault with the EGR system

Have you checked the sparks plugs (and related components), fuel pressure, engine compression, vacuum leakages?

Answered by KHLow2008 (expert)
39,939 answers provided

The problem is fuel related so you should concentrate more on the fuel system.

Answered by KHLow2008 (expert)
39,939 answers provided

My mechanic (who is a buddy of mine and does all maintenance for free as long as I purchase the parts) has checked the spark plugs, which were all replaced about 15,000 miles ago and are in good working condition, but he seems to think the plug wires could be bad, could that be? Thanks for the other suggestions as I will have him check all of those out.

Thanks!
James

Response from jmille14
2 questions asked

Yes, the plug wires could be the cause but it is not likely that all of them are faulty and misfiring at the same time. Furthermore the codes is fuel related. Spark ignition related codes would normally have other misfiring codes.

I would suggest checking the compression and valve clearancesa. Tight valve clearances can cause misfiring as well.

Answered by KHLow2008 (expert)
39,939 answers provided