Quote:
Originally Posted by Brads2002
Not sure how long ago you did the plugs but you may want to check to see if they have backed out. If they are not torqued to the right spec they will back out and cause a mis fire under load. I think the spec is 21lb.
Last car I was working on showed multi misfires across many cylinders along with o2 codes. It had a cracked valve cover.
Possible you moved coil 6 to coil 4?
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I did the spark plugs at some point in January. I will double check they are all torqued to spec. The car was misfiring prior to me touching anything. I only changed the spark plugs in an attempt to fix the misfire issue.
I had a spare new coil and swapped that on 6. Still misfired on 6. I took out the new coil from 6 on the off-chance it was faulty although it was brand new and swapped it with 1, and the misfire stayed on 6. The first time I've seen the misfire move to 4 was last night. Prior to that, it was always on #6.
No other codes such as o2 present. Only one code was pending when I hooked up the scanner yesterday and it was for Cylinder 4. I do not see any oil around the valve cover gasket and the spark plugs were all dry when I pulled them.