viper-blue

I'm hoping someone with more knowledge of Emissions test can offer some advice.

I just failed my e-test miserably:

Driving test at 2454 rpm:

HC: 201, Limit: 64
CO: 4.46,Limit: 0.35
NO: 817, Limit: 485

Curb Idle Test

HC: 369, Limit: 200
CO: 4.01,Limit: 1.00
NO: N/A

The car passed an e-test a little over six months ago (I'm not 100% it was legal, but I presume it probably was.

The car is a 92 si, with an F22b JDM motor. The car has had under 10,000kms put on it since it passed, and the only thing I can see being different is my distributor has a really bad bearing, and the car needs to run for a minute before it will take the revs in the cold.

The kid who owned it before had to put a cat on it to get it to pass emissions. The car has a knock sensor installed, and the oxygen sensor appears to be fairly new.

Anyone have any ideas for me? I plan to check if he hollowed out the cat, and I'm going to pull the egr off and take a look at the valve, and passage-ways.

dudefromaz

I had bad scores on my Emissions test from a bad cat, replaced it and cleaned out the egr valve with carb cleaner and passed. Just my $.02

SNsLude

LOl you're a gross polluter. I used to be one before

Get a new cat. Don't waste time with all that "garunteed to pass" crap. I've tried everything back then when I failed emissions when I was younger and was short on cash. Hydrocarbon amounts represent unburnt fuel. You can try little tune up things like checking your spark plugs, wires, distributor cap and rotor, fuel injector cleaner etc.

Long story short, I got a new cat as well and passed.

__________________
-Steven

viper-blue

The high HC and CO made me think the Cat to. I just can't get past the fact that the cat is only 6 months old. It is rusting quite quickly though, so maybe its a really cheap thing.

I take it with my numbers you guys think the cat must be bad then?

Its crazy, no codes, car doesn't burn oil. I have a 2-way magnaflow, will that work? Or does OBD1 use a three way cat?

kronicus

heres my 2 cents for whats its worth as every car i have except for the prelude does not have a cat and are all lowered so far as a visual verification for a cat is pointless

the cats job is to scrub the engine is what needs to be re-adjusted, but remember you are smarter than bolth the guy working in the emission shop and his comodore 64 powered machine (cali exempt)

i rolled my old beater ford tempo into an emission shop out here and walked out laughing when it passed with flying colors with no cat maf or egr
plugs wires cap and rotor need to be in good condition period!

how many free-low cost re-tests do you have?
can you adjust your fuel by any means?

heres what io have done in the past to pass for whats its worth

inserted a piece of cardboard into the muffler adding backpressure means exhaust gets more time to chill in the exhaust, when you have a cat it can make it work a little better.

or pop of the conection pre-cat and attack the honeycomb inside with a can or two of carb cleaner, the clean surface will scrub better.

any leak in the exhaust system can mess things up but theres no need to replace everything, when i rolled my tempo in it had a autozone special clamped exhaust system leaking from every crevis, a little duck tape help out long enough to get the test done.....

if nothing else works, what has worked for me is to offset the oxygen-fuel levels, is to unplug an injector i have to do this every year on my 280z to keep from crawling underneath and replacing the cat.

however the old method is still tried and tru, get a cat put on there profassionally.....

if its only 6 months old it sounds like your motor needs a tune up, if you have to much blow by (like my z) disconect the pcv valve and tape it closed just for the leingth of the test.

dudefromaz

May be use some seafoam and replace the plugs.... just a thought plus everyone elses ideas