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1992 Jeep Cherokee Question: High NOx levels and failed smog test 5 times. replaced cat,plugs,cap,O2,intake

 

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135jeep, Ventura, CA, February 26, 2013, 03:39
 Rookie

gasket,exhaust manifold, oil, oil filter, coolant,injector seals, and MAP sensor. Still getting 1300 read @ 25mph. this sucks

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  • Answer #1

    Greg's Orange Auto (13020 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 26, 2013, 06:37
     Master

    NOX IS CREATED BY HIGH COMBUSTION TEMPS. IS COOLING SYSTEM IN GOOD SHAPE AND ANYTHING ELSE THAT WOULD RAISE CYCLINDER TEMPS.

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