Question about 1983 Chevrolet Silverado

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What does my 77 gmc K20 need to pass CA smog

I have a 77 GMC K20 that has a 454, I just bought it and it has no smog equipment, do i need a smog pump, egr, charcoal canister, etc? wht exactly do i need to get it to pass smog

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  • Jerry Koski
    Jerry Koski May 11, 2010

    all states differ .. some will make you replace all cats included .. smog pump and all .. Depends on the state.



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As far as I know. Anything 1994 and under don't have to go through emissions anymore, just safety. But, like countrysi248 said, it might depend on what state you live in. Best wishes to ya.

Posted on Jan 26, 2009

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I have a 1977 chevy c10 truck with a small block 400. I just moved to Phoenix Arizona and it has no smog. Will I need to add anything to it to pass emissions?

Posted on Sep 18, 2009


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1 Answer

Gas leaking from charcoal canister after i changed fuel filter, pump, clean egr change egr solenoid. ????

The canister got loaded for a reason, what that may be is hard to track down, let it dry out and see if it happens again. This can be caused by over filling the fuel tank i.e. topping off.

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I have a 1991 Cadillac Deville with a V8. It won't pass smog. Has high co. I replaced the egr valve, charcoal canister, spark plugs, spark plug wires, cap and rotor, catalytic converter, oxygen sen

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Hope this helps..

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I need a list of all emission control devices on a 96 ford explorer for a paper im writing for my apprenticeship

1996 Ford Explorer 2WD 5.0L

Canister Purge Valve
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Can someone please help me???? i keep getting code po401, insufficient egr flow. i have replaced the catalytic converter, egr valve, egr tube, and have tried running cleaner through. it sounds a little...

It may be the vapor canister. It is filled with charcoal and the vapors from the fuel system are sucked through it. If the diaphragm in it ruptures, you will get charcoal powder sucked into the egr system. You can clear it out and it will just **** some more in. If you remove the canister and any powder comes out of any of the hose fittings, it is bad.

Nov 19, 2010 | 1997 Chevrolet Lumina

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I need help locating the vapor canister or the charcoal canister on my 2000 GMC SIERRA 1500.

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1 Answer

Can the EGR valve and vacuum mod, as well as the BVSV be elimnated

To begin with, it's illegal to tamper with smog equipment. And, you really wouldn't find any performance improvement in doing so.

Far better to leave the smog equipment as the factory installed it.

If you are looking for better performance, try ignition enhancements, such as split-fire plugs, ignition tuneups, etc.

Oct 09, 2009 | 1987 Toyota 4Runner

1 Answer


sounds like your egr valve is stuck open. check for false vacuum signal to egr valve holding it open or for a plain old bad stuck open EGR valve.

Jun 07, 2009 | 1990 Mercury Topaz

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2001 Hyundai Santa Fe Error codes BB1,BB2,BB3, BBevap,BBsolenoid. Check engine light is on.

EVAP system is a very COMPLEX system. There is not enough time or space here to adequately diagnose your problem. Components involved are Canister Close Valve, Charcoal Canister, Canister Filter, Purge Contro Solenoid Valve, Fuel Tank Pressure Sensor, EVAP tubes & hoses, Fuel Pump Gasket, fuel tank itself, check valves, Electrical Wiring to and from the ECM and components. Best solution: Pay diagnistic fee and have professionals diagnose problem. This way you'll know EXACTLY what the problem is and what's required to fix it (parts, labor, tax, time-frame, etc.).

Jun 05, 2009 | 2002 Hyundai Accent

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