RUNNING LEAN !!!!

SUTHRNSTANG97GT

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I need some help, my stang has been running kina sluggish and after idleing like at a stop when I give it gas some smoke comes out and the fumes are real strong, so today I pulled the plugs and they where white so I swaped them out and added a new left rear O2 sensor and mil eliminator. Well its running smooth and alot better but i'm still getting the fumes and smoke, its just a matter of time before I will have to replace the plugs again. Any suggestions please.
 

19mustang95

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if the fumes are strong, you are running rich...i would put it on a dyno that does a/f ratios to see whats up.
 

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