SMOG

First Time Failed Smog Test Due To "check Engine" Light Being "on". Repair Shop Performed "smoke Test", Replaced...

I Failed The Smog Test. The Nox Reads High At 15 Mph But Passes At 25 Mph. No Check Engine Light. I Replaced The Spark Plugs And Air...

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...

I Have A 1991 Subaru Legacy That Is Getting Around 14/15 Mpg And Won't Pass An Emissions Test. The Idle Is Ok After A Cold Start Until It...

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, I Have A 1995 Jeep Cherokee And I Can't Pass The Smog Test. I Had The O2 Sensor Changed And Still A No No. Any Ideas What It Could Be...

First Start In The Morning Or A Cool Engine I See White Smog Coming Out Of The Exhaust With No Pressure From Both Pipes. With The Cool...

Car Is Stock No Add-ons. I'm Gettina Po420, Po128, & A P1138 Error Code While Trying To Smog Check. How Do I Fix This? Best Place For...