Chevrolet Smog

My Car Failed Smog Now I Put New Plugs New Wires New Cap And Roter It Is Now Back Fireing And Idle Is Rough, It Ran Good B4 I Did All This...

I Replace My Engine With A New 305 2 Years Ago And Passed With Flying Colors A Year Ago Smog Cam Up And I Failed On Everything But Gas Cap...

Supposing 1 Of 3 Previous Owners Changed The Ecm But Got The Wrong Chip (say Out Of A Junkyard 7.4l) Now Causing Excess Fuel Injection...

1st Test 522 Ppm Hc (limit 220) 5.41 Co% (limit 1.2), Co2% 11.5, O2% 0.1; High Idle Ok At 43ppm Hc, Co% 0.01, Co2% 13.6, O2% 1.4; Always Ran...

New Exhaust Pipes, New Catalytic Converters(2) Went To Inspection For Emissions Test.failed Hydrocarbons And Canon Monoxides. Mechanic...

Sounds Like A Grinding Noise The Car Passed Emissions Test And Made It It Sounds Like Transmission But It's Coming Underneath The Car It...

Engine Performance Problem 1988 Chevy Truck V8 Four Wheel Drive Automatic 255k Miles I Have A 1988 Chevy 2500 With A Newer...

Hi, Thank You For Your Responce! My '88 Nova Failed Emissions Co Test. Standard To Pass Is 15.0. And This Car Is At 120 To 140! I'm...

I Failed The Emissions Test The Max Reading For Nox Is 4.5 I Failed With A 4.59. The Truck Had Been Parked For Aver A Year. I Put Some New...

I Just Swapped My 1988 5.7l For A 1993 5.7l Transfered All Scencers And Stuff But Want To Put Headers On The 1993 5.7l Can I Do Away With...