SMOG

Hi I Had My Emission Test Pass And A Tune-up Last Year On My Saturn Sc2 2002 Only 53,000 Miles. It's Been Idling Really Rough When In Drive...

What Can I Do To Resolve It? Please Help!

I Have A Problem With The Car Passing Smog Due To The Cel. P0341 - Obd-ii Trouble Code: P0341 Camshaft Position Sensor Circuit Range/...

I Have A 1992 Toyota Corolla. It Passed The Smog Test 2 Years Ago But Not This Time. My No Ppm Were Around 1300 For 15mph. I Barely Passed...

When We Buy The Car 3 Yrs Ago The Milleage Is 73,000 So Now The Milleage Is 85000. When We Send It To The Smog Testing The Automotive...

Car Won't Pass Emission Test What Is Passable No (ppm) M2: 25 Mph Mine Measured 44 I Have A 93 Saturn Sl2 I Am In California

I Am Trying To Get My Car To Pass Smog. The Only Mil That Does Not Pass Is The Catalyst. I Replaced The One That Is Just Under The Intake...

My Car Is High In Nox And Already Reduced Everything Else Egr Was Bad And Changed It New One Didn't Work Neither After Warm Wount Hold...

Here Are The Before After Results: Both Passed, The After With Much Better Results. Before 8-23-10 Odometer 179,375 Miles...

What Causes Co% (max.63 Measured 1.57%) To Be Too High In Only The 25 Mph Test? Before This We Had To Replace The Egr Valve And Reset...