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Message: <blockquote data-quote="hottwheels04" data-source="post: 1444186" data-attributes="member: 8550"><p>No i just bought 2 new ones and put them in after I replaced the vaccum hose. So i bought a new pair of NTK. Once the weather warms up I will try that or just put the new other set in. Yeah I'm running bbk long tube headers.  Just weird only time the check engine light comes on is once im on the highway and after i shift into 5th gear  ( over drive) then the light will come on and go off come on and go off blink on and off.  then sometimes comes on stays on until i shut the car off. once i restart it , it wont come back on.I can drive around town or just shift through 1st,2nd,3rd, 4th gear and light never comes on. but soon as i shift into 5th on the higway it does. its code 172 passenger side 02 lean</p></blockquote><p></p>