Chevrolet Smog

My 1997 Chevrolet Cavalier Just Failed The New Mexico Emissions Test. Although The Actual Emissions Were Fine, The Diagnostic Code P1404 Was...

I Have A 97 Chevy Malibu 6 Cyc That Failed The Emission Test Because Of Intake Air Temperature High. I Change The Air Temp Sensor ,filter...

I Have A 1996 Chevy S10 With 207156 Miles. It Has Loud Knocking, Will Not Pass Smog, It Has High Hc And High Co. It Also Has Low Oil...

At Low Rpm Hc Is 125 And Allowable Is 100 What Would Cause This . There Are No Codes And Check Engine Lite Is Off.

My Computer Is Not Developing Codes For Emission Testing Required In Az. Obd Ii Process. Cats Replaced By Gm 21,000 Miles Ago. It Is...

Code P1572 Failed My Smog Test. What Does This Code Mean?

My Truck Failed The California Smog Test. Passed The Visual And Functional Portion And There Are No Codes Showing. On The Smog Inspection...

So Here's The Problem My Car Is Having Trouble Passing Ca Smog Test. I Have Taken The Car To Two Different Mechanics And They Can't Figure...

95 Chevy Beretta Failed Hc Emission Replaced Cat., Oxygen Sencer, Keep Having To Add Antifreeze,does Need Muffler, It's Not Real Bad. The...

I Have A 95 Chevy Astro Van I Went To Get Emissions Done And Failed Just On The Low Hc. The Llimit Was 220 And I Had 454. I Just A Complete...