If I knock out the inside of my cat will it pass smog if I try to smog the car

SOURCE: On a 91 ranger, can you replace the 2 cats with 1

not if you live in California, I dont know about other states.

Delage guy

• 167 Answers
• Posted on Mar 30, 2010

SOURCE: cant get it to pass smog. i replaced the cat but

Try replacing the sparkplugs and running some injector cleaner through it." Smog " is basically a test to ensure your car is clean burning , A nice strong spark gives a cleaner burn reducing emissions.
If your car is burning oil , the additional oil in the emissions can cause a fail and Hondas are a bit prone to burning oil.

SOURCE: I just bought a Honda civic,98 .my car isn't

This might be due to innefficient air - fuel combustion. One reason causing this is the piston displacement and poor compression ratio. Better yet have the engine tuned up and considering the age of the engine maybe this is the perfect time for it to be overhauled.

jcplancarte

• 4 Answers
• Posted on Nov 01, 2012

SOURCE: CEL P0431 but passed smog emissions in CA - how can I pass emissions if the CAT is damaged? Could it be another issue?

Maybe not your answer, but it is related: Before going to have your car smogged, check your gas cap. Check the condition of the gasket, or o-ring, inside the gas cap. If is already drying out, full of cracks, get a new one. It will not pass the visual inspection. The smog technician, salesman, will try to sell you a new one for $15 when you could get it for $8 at your local auto-parts store. The technician will tell you that if you do not get it right there and then, he will have to fail your car on the visual test and you will have to comeback to have your car re-smogged again.
The cap might still be doing an OK job of sealing the tank, but it won't pass the Visual, especially if the tech wants to sell you a cap. You can tell if the cap is doing its job if you hear a hissing sound whenever you open the gas cap after running the engine fro a while. If it is not providing a good seal, then you might get a check engine light with a code about a failure in the evaporative system.
Just a little thing to check before you go and put yourself at the mercy of the smog tech.
For $15 you could get a locking gas cap, which might be a necessity now with gasoline prices being what they are, now.

SOURCE: 2003 kia sedona lx didnt pass smog code p0421

P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1)
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Can Clip Renault