Questions & Answers for: Chevrolet C1500 fix failed smog test

I need a free manual for a 1977 C-10 Chevy truck i need one that i can download for a 1977 C-10 chevy truck, or atleast a diagram of the vacuum line and the smog line. Try Here

...Failed smog (low 240 ppm and high speed 1830 ppm hydrocarbons). Replaced plugs,wires,rotor, dist cap and oil change. NO CHANGE. Tried to get computer trouble codes but alI I get is a very fast ...

...smog done on it, it wont pass but no-one will tell you what the problem is. I'm sure it is one of the sensors. Also, have no high beams, blinkers don't work, hazard lights don't go on. Could all of ...

...shop to ck it out and tell you why it wont pass, and then they can recommend what needs to be

looking for a vaccum diagram for a 1986 chevy pickup 2wd automatic with calif. emmisons. all tags have been removed YOU CAN PURCHASE A DIAGRAM FROM A LOCAL SMOG STATION

my fuel pump stop working i replece my fuel pump and a lot black smog coming out from my tail pipe engine stall Sounds like a bad fuel regulator check for fuel in the map sensor vacuum hose and check ...

...FAILED NOX 2.36 APPLICABLE STANDARD - 5.00 PASS SECOND TEST HC 2.29 APPLICABLE STANDARD - 3.00 PASS CO 55.71 APPLICABLE STANDARD - 25.00 FAILED (whats going on here) NOX 2.27 APPLICABLE STANDARD - ...

emission is high how to pass insecption they should have told you what to fix when you failed the test. Far too much to start guessing....

how to get more power and pass Calif. smog 91chevy c1500 4.3 v6 ? and stay calif.legal best advice is to have a turbo fitted by an accredited turbo specialist shop. They will have the equipment, ...

...failed due to: just over the limit for hydrocarbon emission. I replaced the cap,plugs,rotor,and wires. Do I need to do anything else that will help my hydrocarbon emission? Have a complete change ...