rich, rich, rich, rich, rich, rich, rich, LEAN!
 

Friend pulled his sparkplugs recently, and all of them were rich except for one, which was, well, lean. heh. What are some things to think about that would cause one cylinder to run that different from the rest?

It's a 305tbi, open element air filter, xtreme lit thingie, timing set to 6*BTDC. Little else done to it, except for a heater/ac/smog removal.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else