SOOBOUTLAW Posted May 6, 2009 Share Posted May 6, 2009 Had my motor out of the Legacy so I decided to look at the plugs, because the driver's side is so much more accessable. All four plugs are white. Motor ran fine though. I have a full modular cold air intake and a Flowmaster on the stock exhaust (yes, I always recalibrate the computer). Could it be a bad O2 sensor? Haven't checked any codes yet, will get running today hopefully. CEL comes on randomly due to the underdrive pulley making my knock sensor act up when the A/C is running. Quote Link to comment Share on other sites More sharing options...
CNY_Dave Posted May 6, 2009 Share Posted May 6, 2009 From the motorcycle world, I've heard that today's fuel and engine mappings don't leave a plug nearly as brown as they used to. Dave Quote Link to comment Share on other sites More sharing options...
Rooster2 Posted May 6, 2009 Share Posted May 6, 2009 From the motorcycle world, I've heard that today's fuel and engine mappings don't leave a plug nearly as brown as they used to. Dave Agree with Dave. Old plugs I pull are white now are whitish. I am guessing that the hotter spark in today's plugs cause this. I don't think you have anything to worry about. Quote Link to comment Share on other sites More sharing options...
SOOBOUTLAW Posted May 9, 2009 Author Share Posted May 9, 2009 Agree with Dave. Old plugs I pull are white now are whitish. I am guessing that the hotter spark in today's plugs cause this. I don't think you have anything to worry about. Burning holes in my pistons? Well, it runs just fine though. But, I read somewhere that "you can run rich all day but run lean only once". Quote Link to comment Share on other sites More sharing options...
CNY_Dave Posted May 11, 2009 Share Posted May 11, 2009 Burning holes in my pistons? Well, it runs just fine though. But, I read somewhere that "you can run rich all day but run lean only once". If you were that lean' I'd expect a code. Dave Quote Link to comment Share on other sites More sharing options...
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