i have an 89 iroc w/ 305tpi and 700r4
here are the results -

mine: HC-2.20gpm CO-03.73gpm NOx-1.68gpm
legal: HC-0.80gpm CO-15.00gpm NOx-1.68gpm

i passed everyting else and i have all of my emission stuff in the car-
cat and air tubes

what would make the HC's so high-
i've check the igition and its ok. it has new wires plugs cap and rotor thatis less than 5k old. and just to make sure nothing went bad i pulled one wire off the cap, one at a time while she was running to see if there was a change with the motor and there was a change with every plug so all 8 cylinders are firing

a couple people told me that i might have a clogged cat and this what i'm hoping for-

 

High HC levels are a result of an uneven air-fuel ratio. Too rich or lean of the air fuel ratio will result in an incomplete burn in the combustion chamber.

 

can it be cause the motor was hot. like 220degrees.

it was running too rich.

would putting in a lower ocatane gas help?

 

actually the higher octane would burn quicker and from what i heard, the hotter the engine the more best-ready it is for e-check.

 

i'm pretty confided that its my cat-

i've been searching all over the web and wha i've found it that

The three harmful compounds are:

Hydrocarbons (in the form of unburned gasoline)
Carbon monoxide (formed by the combustion of gasoline)
Nitrogen oxides (created when the heat in the engine forces nitrogen in the air to combine with oxygen)
Carbon monoxide is a poison for any air-breathing animal. Nitrogen oxides lead to smog and acid rain, and hydrocarbons produce smog.
In a catalytic converter, the catalyst (in the form of platinum and palladium) is coated onto a ceramic honeycomb or ceramic beads that are housed in a muffler-like package attached to the exhaust pipe. The catalyst helps to convert carbon monoxide into carbon dioxide. It converts the hydrocarbons into carbon dioxide and water. It also converts the nitrogen oxides back into nitrogen and oxygen.

thats taken right from howstuffworks.com

 

you couldnt be more wrong from what ive heard...

you are correct.

 

First do a complete tune up including Air filter, Fuel filter, Oil & Oil filter change, stock timing setting and check the fuel pressure to make sure the injectors are getting the correct fuel pressure.

I didn't mention the cap, rotor, wires or plugs since you already mentioned that you changed those. Have the car tuned up by a reputable mechanic, he can hook it up to a diagnostic machine and tell you if it will pass your states emissions standards.

After you have the engine tuned up the mechanic can tell you if the catalytic converter will also need to be changed. When the catalytic converter goes bad it's because something upstream caused it to go bad and if not fixed, it will probably make the new catalytic converter go bad eventually.

Also, higher octane fuel burns at a Slower rate than lower octane fuel. That's why forced induction engines; Turbos, Supercharged, Nitrous Oxide require it to stop detonation or knock.

 

John, I got 2 words.... oxygen sensor. I had my IROC inspected and it failed the same yours did, too much HC and CO. Had the O2 sensor changed and tested again. Passed with flying colors. In fact, my HC went waaaaayy down, and my CO went to 0.0. The 18 year old, 85,xxx mile 305 is running cleaner than my 3 year old, 26,xxx mile 3.4!

 

if you still dont pass, come and tell us again, there is a lot of other things that can be done. alchold+gas mix, mess with timing, etc.

 

write pres bush and ask him why yer cars needs to pass emissions...............but large corps are exempt........oh i just remembered....we pay the corps take...never mind.....some lucky dood is collecting all that emission testing money and laughin his azz off us

 

dont talk out of your a$$. corps are not exempt, if anything they have to conform to stricter pollution guidelines then cars do. i just helped a friend that is the air quality contoller for a medium sized company write a report for the so cal air quality management district and they have to record there pollution to the nearest tenth pound FOR THE YEAR. that means they constantly have to know exactly what and how much pollutants are being put in the air every second. after tuning up my car and getting the settings right, i passed emmissions with flying colors. that included bringing my CO down by 10%!. my 5.0 mustang barely registers on the sniffer. the problem that most people have with emmission testing, especially in california, is the visual. there is no reason that they should care for a second what we are running under our hood, as long as it dosent impede with the structural integrity of the chasis. what comes out of the sniffer, does in fact matter. ive seen pictures from the 50's in los angeles and do not know how the people could deal with the smog. look at los angeles now, it looks a lot cleaner, and the air is cleaner. that is a direct effect from the smog laws imposed on corporations and cars. im not a tree hugger, but if a car is in tune, it makes more power, more effieciently. that means more power with less smog.

 

ok well i figured it was the cat but now i don't know-
i'm going o do an

oil change
O2 sensor (even if this not it i will do it)
clean my air filters(they are K+N's)
and the feul filtr was replaced about 5k miles ago it still should be more than good correct.

 

demonchild i SAID LARGE CORP.....not some small fry paying all the bills!!!!!!!! and by the way at least when i talk out my A$$ its not outta my mouth

 

i got something add here ...what is it with all you peckers heads.....all got a sticks up yer azzes????you don't read and know yer cars...and you don't know a dam thing whats really goin on in the country...but you can sure criticize....................




.dont talk out of your a$$. corps are not exempt, DEMONCHILD you don't know so shut yer pie hole!

 

hey c hildren can we fight somewhere else or grow up, cause i need to pass emissions.

 

virco in downey, cali is not a small corporation and if everyone at high school put up a fight every time someone else told them they are talking out of their a$$, there would be major problems.

anywho, wyclefsirocz did you pass emmissions yet or are you still missing. By the way, is you engine mechanically good, because if it is, you are way ahead still.

heres a list...

spark plugs
new wires
new cap/rotor
new air filter
check timing
new pcv valve
inspect and replace vacuum lines
new o2 sensor

run it really hot, like wot a couple times on the freeway before you take it to get smogged

im not really good with the tpi because i run a carb, but there are some tpi gurus that can tell you what ca be checked on teh tpi.

WAIT i just remembered, your egr is most likely shot if you are running high HCs. if you check all this, then get a new cat. however, make sure that your emmissions are close before you put a new cat on or you will mess up a new one. also, cats need to be broken in for a coupel of days and usually take a month to take full effect.

 

thats ok- i had some problems with burnt wires and fouled plugs for about 3k miles b4 i could finally get them all fixed. so saturday i will do an oil change, O2 sensor, "just check everything else" go back and then see if i will pass- then if i fail i will get a new cat thanks fdor the help i'll get back to you guys-

 

Good luck on that O2 sensor. Once you finally get a wrench on it, have fun turning it.

BTW, rain in the forcast for this weekend.

 

Before you go dropping all kinds of money n labor, lets start with something easy. How about mixxing a lil alcohol in when your gas is empty n then fill up? Retard the timing if you feel comfy doing that. By just almost doing that alone you could very well pass.

To bad you don't have a carb or i could tell you more easy lil things that won't cost you much if at all.

 

1st- labor isn't much cause i do 100% of the work my self---
2nd is that the O2 sensor is stock and never been replaced as far as i know it.
3rd i have a pit and getting acess to it will be be muchh easier than most of you think

4th i have the pit hidden in a garage so it makes it all cake
the pit isn't very pretty but it gets the job done.

 

dont most smog techs check the timing to make sure it is correct. in cali they will not pass you iff your timing deviate like 2 on each side. the alcohol sounds good, but i never tried that.have fun tomorrow and keep your fingers crossed.

 

Well, I messed with my holley right when my iroc was on the scale, that included giving it a lil bit more air and i advanced the timing a lil cause it was backfiring n they couldn't run it. But thats here in Ohio, don't know how strict they are elsewhere.

Yeah alcohol surely does the trick but it does eat up gaskets so don't get carried away and if u can pass without it, do it.

 

from my experience with emissions, i'd do the O2 sensor first, and the oil change if it's no big deal, but if the O2 sensor doesn't do it i vote for the cat. i had a similar situation, and nearly passed after two trips back and some tuning, only to find out the idiot i bought the car from apparently hammered a 1x1" through the cat. needless to say, my emissions went from what you had to nearly zero, there's no more hesitation from a weird resonance in the exhaust system, and it's quieter. which is all good. the O2 sensor not only helped out mid-RPM performance, my city MPG went from 12-13 to 17-18 overnight.

anyhow, the point of emissions laws is not to pass on one single day by adding methanol, it's to reduce the crap ending up in the air and make sure the cars are in tune most of the time. i've never seen more of a waste of effort and money than people trying to squeak by emissions with additives and tweaks. just fix the problem. bad O2 sensors don't just cause emissions, they cause lousy engine performance.

also, the idea that corporations are pollution-control exempt is ridiculous. (please at least provide whatever tabloid or south dakota anti-government militia newsletter article you read that in when you make those claims, if for nothing else than our entertainment)

 

so did you pass yesturday???

 

lmao

 

didn't get it inspected yet. no cash till tommorrow (early pay day)

i pulled out the O2 sensor and replaced i. when i pulled it out the car looked and appered to be running very lean. the O2 senosr was white, like the color of hot charcol white.

 

here in the great state of Ohio, every year we get 3 attempts before we have to start paying the $19.95. I thought it was like that everywhere with a requierment of a state emissions?

 

oh no its a $35 fee pass or fail in most shops

 

But when you go back to get the emissions re-tested they will only charge you $25, since you passed the safety part. You do still have the printout the shop gave you, right?

 

ahh yeah i have t, i'm gonna go to anothe rhsop i've heard a couple things about roadside that oi dont like.

 

If you want a suggestion, there's the guy that I go to. Don't have the number on me right now, but he's at the corner of Rte 109 and 9th street, the small gas staion on the corner, north side of 109. Ask for Joey, and tell him Mike with the black IROC and red Grand Am sent you.

 

in what torn. 109 is anoubt a 1/2 mikle rom my house but i don't know where 9th street is, i'll atke a look at the map tommorrow but if ya give me a town or sumthuing that would be great-

 

Oh he's about 2 blocks or so east of Wellwood Ave. I'm not sure if it's considered West Babylon or Lindenhurst right there. It's a small brick 2-bay building.

 

iight thanks--