CHEVROLET EMISSION

I Have Had Hesitation Problem With My Vehicle. Now There Is Charcoal Pebbles Getting Blown Back Through The Vacuum Line Into The Vacuum Pump...

My Dealer Wants To Give It An Emission Service To The Tune Of $159.95. Is This Important To Have Done? I Have Always Followed The...

Greetings-new Question I Partially Rebuilt A 1992 4.3 That Was In My 89 Chevy Pu. New Valves #1 Cyl, Reset All Other Valves, Honed Cyls...

I Have A Motorhome With A Chevy Express Chassis. Tried To Fill Tank And The Gas Came Right Back Out. Took It To A Repair Shop And Had...

Have A 1999 Chevy Suburban Took To Have Smog-ed Failed Because Of The O2 Sensor And The Knock Sensor Replaced Boths Sensors Light Still On...

I Am Replacing The Secondary Air Injection Pump And Need To Know Where It Is. Car Is The Lt Model.

I Threw A Code 350 Miles Ago Due To A Loose Hose. The Code Was Immediately Reset And I Drove Approximately 150 Miles Before Going For My...

So I Failed Emissions. Idle Reading Hydrocarbons 438 Standard Is 220. Carbon Monoxide 2.20 Standard Is 1.20 Everything Else Passed Whats The...

My Purge Vacuum Diagnostic Switch Has A Vacuum Line Hook-up On Each Side Of It. One Goes To Evaporator Canister And The Other Goes To Purge...

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