I live in Colorado and went today to get my emissions tested and I failed! They said that my HC and CO levels were too high. For HC, 2 is passing and I had 3.2593. For CO, 20 is passing and I had 44.6744. The said that the HC level is high due to unburned or partially burned fuel. The high CO level occurs when the air/fuel mixture is too rich. What can I do to fix this? If I can make it back there in the next 10 days, I don't have to pay agian, so please help. I have a hi-flow catalytic converter, but would that cause this? Any help that you guys can give me would be greatly appreciated. Thanks

 

I would recommend the following:
Run a few cans of seafoam thru the intake and fuel system after that a tuneup and finnaly replace you O2 sensors and that should do it.

 

how old is your converter? High flow converters don't seem to last long. If you ever had a bad opti or a burnt plug wire, the extra raw fuel tends to burn up a converter pretty quick. Thats why mine failed a while back.

 

Umm... yes! A high-flow cat has a lot less mesh to catch the extra particles versus a stock cat which has more mesh thus it results in less horsepower due to the mesh being in the way of the exhaust flow

But, with a good tuneup and a close to stock engine, you should pass even with a high-flow cat.

 

I passed with a highflow cat, the high HC is more then likely cuz by faulty plugs/wires or could possiablely be a bad injector.

 

Not true

Anyway, you might want to look into replacing your EGR valve.

 

Which part is not true?

 

The part about the mesh. A high flow cat being a high flow cat has more to do with the seams on the front where it goes in/out to a 3" pipe, and the catalyst itself (which is attached TO the mesh), then the amount of mesh inside (the entire cat is going to be full, I promise you.)

My carsound cat decided to turn itself into straight pipe after 9 months of use with a big cam.

 

The cat is only about a year old. Also, I replaced the O2 sensors at the same time that i put the cat on. I don't want to have to get rid of the cat, so any quick fix that will just allow me to pass is all I'm looking for. I will try the seafoam if nobody else has any other suggestions. Anyways, thanks for the help, but any more suggestions would be greatly appreciated.

 

I'd recommend running it by Autozone and have them check again for your mixture, my quess is that you're 02s need replacement.JMHO

 

yea, before i empty out my highflow, it was completely full.(now its not)

 

I am just looking for a quick fix to get me past the test. Then I don't have to worry about it for 2 more years. I have heard that if you put a couple bottles of HEET into your gas tank, it will burn cleaner with lower emissions. Has anybody tried this or heard of it working. Please Help!

 

Quick fix: run the ever living **** out of the car. Add a liter of alcohol. Get tested while its HOT

 

I have the fans set to come on sooner. Could this be part of the problem? Should I take out the relay when I get to the emissions place or will that cause a problem? I know that they run it on the machine for about 4 or 5 minutes. Will my car still be okay?

 

they shouldnt effect the readings at all. I say get it hot because your catalytic converters work best when hot.