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Diagnose Spark Plug - Something's Wrong
Attached is a plug I just removed from my rebuilt motor - about 600 miles - and my milage (MPG) is horrendous. Any ideas?
http://forums.pelicanparts.com/uploa...1211564607.jpg |
Now you need to find out why it's running so rich. Things to check might begin with the frequency valve operational, 02 sensor, dome light working? Or take it to a wrench who's familiar with these hints.
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Do all the plugs look the same?
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I actually ran it on teh freeway then shut it down without taking it to idle and snapped th epic then - so I only checked one plug. Whan I changed the plugs about 200 miles ago they were all similar.
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That explains to me why the plug and black and white at the same time. Is the O2 sensor hooked up? I guess you ought be chasing idle mixtures because the freeway RPM is actually lean.
that didn't make any sense, did it? |
Get more miles than 600 on it. I assume this is you SC and not the 914?
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Maybe its the angle of the photo but that gap looks a little tight, are you getting higher then normal engine temps?
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