Hello i'm new to the forums i was hoping someone could help. I own a 93 honda civic stock its failed smog twice on the emission test it was a gross polluter. I'm going to post a pic of the smog report i was hoping someone could tell me what i need to do to pass smog .

 

Well post your emission numbers from the smog test. But mostly if it is the original exhaust system then you might have a bad cat!

I had the same problem and got a bolt on replacement cat from the parts store for like 180 ish dollars

 

http://s1282.photobucket.com/user/vince94hogan/library/>

 

I posted link of smog emissions. and the exhaust is cut off i bought the car like that but the cat is still there do not know if its good.I took it for testing and the mechanic wasn't sure what was wrong he said to start with the cat?

 

Does the CEL work? Any CEL codes thrown?

Have you replaced the plugs, wires, cap, and rotor and adjusted the ignition timing?

 

I'm not sure about cel I'm a new car owner. Yes I had the ignition timing set

 

Click the Codes link in my signature.

 

The check engine light is not on

 

Does it work?

 

I just bought the car so idk. Does the emission test look bad?

 

Just "I just bought my car" mean you don't have it in your garage/driveway/outside your house? Go check to see if the CEL works. When you turn the key to ON(II), it should turn on for about 3 seconds, then turn off. If it doesn't, that means that either the bulb is dead, or the PO removed it.

The test says you failed, so yes, it looks bad.

 

Yes the cel light works when I turn the key it's shuts off after a couple seconds

 

Boy am I glad we don't have emissions testing here.. although I'd probably pass anyway at this point. What do you mean the exhaust is cut off? Does the car seem to run well or is something noticeably wrong? As mentioned, the cat comes to mind

 

So if I'm reading that sheet right, your HC at idle is high, but everything else is fine. Your car is idling at 900 RPM - that's high. Adjust your idle. There should be a write-up in the FAQ's sticky, or you can download a factory service manual.

 

The car runs good. The exhaust is cut passed the rear wheel everything seems fine to me and the cat is still there. Have come on the sheet it says the cat passes?

 

Yea ill have to download the handbook thanks. The handbook will tell me were to adjust it at?

 

Here's what you do.

1. Do a Tune-Up (plugs, wires, cap/rotor, air/fuel filter, PCV valve) & oil change
2. Go test the car again.


It should be good after that. If the HC is still a little high at idle the second time around, pull your plugs out and gap them to 0.70" for the smog test only.

Once the test is over, gap them back to 0.44" and then go home and perform a leakdown test. If leakdown test results are good, go to a muffler shop and check your catalytic converter efficiency.