SMOG FAIL

I Have A 1996 Grand Prix Se, 3.1 Liter With 150,000 On It. The Other Day It Failed Inspection With The Codes P0303 ( Misfire Cylnder #3 )...

Failed Functionality Test (no Data From 02 Sensor, 02 Heater, And Evaporation System). After The Oil Changed Odometer Was Reset And Added...

I Recently Had My Bank One Catalytic Converter Replaced. The Engine Check Light Has Not Come Back. But, The Car Will Not Pass Emissions...

Mechanic Says Blown Head Gasket As There Is A Misfire Number Three Cylinder. It Runs Rough At Idle, But On Freeway Runs Great. It Does...

Hi Guys, My Dependable 1992 Integra(gs, Automatic) Failed Ca Smog Test This Time: A) It Failed In Nox Column For 25 Mph At A Test-only...

My Taurus Has The 3.8 V-6 And Has Always Passed The Required Smog Test's Every 2 Years Up Until Now. I Guess The State Added A Fuel...

My Truck Has 290,000 Miles And It Won't Pass Smog. They Say I Need A New Catalytic Converter? Does That Sound Right To You. I Thought They...

My 96 Mazda Protege Failed Emissions. I Would Like To Know How To Fix The Following Codes Po130, Po170, Po740 With Out Spending An Arm...

I Have A 1989 Plymouth Voyager That Has Failed It's Smog Check. On The Initial Test, It Passed All Emissions, But Failed The Pressure...

My 94 Cavalier Failed Smog Due The A Emissions Leak And High Something. The Guy Didn't Tell Me What I Need To Fix It And I Need To Know...