Quote:
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Originally Posted by Dean
Plugs only reliably tell a story if you put in a freash set, run them at the RPM/Load you are interested in for a while, and turn the ignition off without doing anything else. Stop the car, and pull the plugs.
Anything else is mostly crap data.
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I can see that bein somewhat true (RE: assuming AFR's), but if the electrode melts off, I think that tells you somthing for certain.