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Failed emissions test today!!!!!

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Old 04-11-2002, 10:42 AM
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Failed emissions test today!!!!!

Took car in to get vehicle inspection sticker and it failed. Report say the percentage of HC is high only at idle speed. Any ideas what it could be, maybe O2 sensor never been replaced. Fuel filter replaced, been at diagnostic center no codes show up on computer.
Fuel pressure checks out fine, bought PCV valve will replace this weekend, throttle body cleaned out a while back, spark plugs have been changed, cleaned AAV valve. All connectors to sensors are fine.
New universal catalytic converter put in a month ago. The report says that the HC (ppm) value should read no more that 220, mine reads 353 at idle speed and 120 at 2500 RPM. Don't know where else to go or what else to do. Any help appreciated.
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Old 04-11-2002, 11:42 AM
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Would a bad PCV valve cause high HC (hydrocarbons) reading only at idle?
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Old 04-11-2002, 11:46 AM
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You sure your universal cat is a 3-way? I believe the 3rd is for HC or whatever. Call the company and ask.
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Old 04-11-2002, 11:49 AM
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was the cat hot when they did the test at idle?
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Old 04-11-2002, 12:45 PM
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Originally posted by DanNY
was the cat hot when they did the test at idle?
Jeff, I really don't what you mean by 3-way, but I did notice when they were putting on the cat it was just a bit smaller than the original.

Danny, the car and the cat were warmed up, as far as the cat being hot don't know. The inspection place was not too far from where I work
I didn't have to get on the highway or anything like that, but the car was upto operating temp.
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Old 04-11-2002, 03:23 PM
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Originally posted by NOMAD92SE


Jeff, I really don't what you mean by 3-way, but I did notice when they were putting on the cat it was just a bit smaller than the original.

Danny, the car and the cat were warmed up, as far as the cat being hot don't know. The inspection place was not too far from where I work
I didn't have to get on the highway or anything like that, but the car was upto operating temp.
When i first got my car it failed the emissions test. The mechanic quickly put on another o2 sensor and the results were like night and day, passed without a problem.

If yours has never been replaced (which is what I think you said) Then replace it.
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Old 04-11-2002, 05:27 PM
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change the pcv valve and the o2 sensor and you should not have a problem. Remember to let the car warm up real good drive it somewhere before going for inspection. The cat burns the exhaust gases better. Try putting a bottle of chevron fuel injector cleaner in your tank.
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Old 04-11-2002, 05:37 PM
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Re: Failed emissions test today!!!!!

i love Florida...lovely ladies, they're gonna give me my college tuition money, and...no emissions!

and i'm close to mickey...
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Old 04-11-2002, 08:01 PM
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Thats what im talkin about!

Duuude,What you gotta do is move down to south florida-NO EMISSIONS!
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Old 04-11-2002, 08:59 PM
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or good ol' indiana
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