SMOG FAIL

I Have A 92 Toyota Paseo. It Wont Pass Smog Due To Engine Rpm Being Out Of Tolerance. What Could Be The Cause Of This

Faled On The Co, S The Max Was To High On Low Rpm And On High Rpm What Could Be Causeing This Problem I Put New Plugs Wires Cap & Rotor...

Wont Pass Smog Code P0430. I Found A Vac Hose That Was Not Connected To Anything But Dont Know Where It Goes Because Part Of It Is Missing....

The Truck Is A 2.2 Engine And It Wont Pass Smog Do To High Knocks What Do You Think That Could Be

Last Year My Wife's 02 Pontiac Gp Failed An Emission Test Due To Code P0420 Which Means " Catalyst Below Threshold Bank 1. We Replaced The...

I Have Replaced 3 Catalytic Converters In 3 Years And I Still Can Not Pass Smog. I Keep Have The P0420 Code, Help

I Have A 1997 Honda Passport (3.2l, V6 Engine, 141,989 Miles), And It Has Failed Smog Due To (very) High Emissions, Specifically "hc"...

I Went To Take My Emissions Test Today And I Failed, On The Paper It States Trouble Code Po421, What Do I Need To Fix In Order To Pass...

Honda Recently Failed Emissions. First Test Failed Miserably. I Replaced Upstream O2, Pcv, Air Filter. Second Test Passed All But Co At Low...

I Am Interested In Buying This Truck From My Work, But The Problem Is It Wont Pass Smog The Engine Soon Light Is On And When I Took It Down...