SMOG FAIL

I Have An 88 Toyote 4runner Than Wont Pass Smog. So Fat The Cat Has Been Replaced A Tune Up And The Timming Set But The Nox Are Still Over...

Even Tho My Check Engine Lite Is Not On. It Wont Pass Smog. It Had A Faulty Thermostat. Replaced It And Smog Test Comes Back As Incomplete....

My Car Runs Fine Had Water Pump Replaced Still Cant Pass Smog Also Change The Plug Wires And I Also Changed Coolant Sensor And Plugs Wires...

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"...