Timing corrections.. Can I diagnose with 1 coil?

Timing corrections.. Can I diagnose with 1 coil?

I am having a timing correction issue

http://ift.tt/1T8KiKY

I just had injectors replaced, I put in new NGK plugs gapped at .021. And as of right now I just finished a walnut blast (this log is without the blast).

If the blast does not help it, what should I be doing next? 1 coil at a time?

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Timing corrections.. Can I diagnose with 1 coil?