Quote:
Originally Posted by cowmeat
I think the importance of the plug indexing is a little overrated. The plugs had just been changed in my second Insight when I bought it, but were the wrong index (A versus B). I was too cheap and lazy to change them out, but I was able to maintain 70+ mpg tanks the entire time I owned the car, and never noticed the difference.
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A versus b is only 90 degrees
Put a c in and it can cause roughness, same deal if you overtorque