Yea so i failed smog yesterday all i could think of is tune up and a new cat ?
my numbers seem kinda high

Motor: 93 Ex D16Z6 188k miles, DC Sports Header

15 mph

hcmax:93 GP: 283
hc meas: 229

co% max: .57 GP: 2.07
co% meas: 1.98

no max:720 GP: 1970
no meas: 1383


25 mph

hcmax:59 GP: 233
hc meas: 244

co% max: .55 GP: 2.05
co% meas: 2.65

no max:774 GP: 1770
no meas: 731

FAIL GP



Modified by Evolution-93-Ex at 10:52 PM 10/13/2006


Modified by Evolution-93-Ex at 5:39 PM 10/14/2006

 

wow i cant get no help ? but you can answer to "exhaust choice help" isnt this a tech thread ??

 

Patient... Everybody is not on here all the time..
it's only been 1 hr.

I would subjest a tune up, and O2 and Cat.
You probably be running a little rich...

 

up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC_RaceR &raquo;</TD></TR><TR><TD CLASS="quote">Patient... Everybody is not on here all the time..
it's only been 1 hr.

I would subjest a tune up, and O2 and Cat.
You probably be running a little rich...</TD></TR></TABLE>

No, he's definately right.

If somebody posts which exhaust will give 'em the best sound, it'll be 8 pages long with 40 pictures, and 10 sound clips. Simple guy like this needs help passing the rape exam in CA and nobody's around.

Happens all the time.

Anyway, I don't live there, know nothing about the test, so I can't help him, just thought I'd voice my opinion as to what you said.

 

I agree. Change plugs, and your HC should go down.

Had the car already been warmed up before taking the test?

You NOx is high. If the car had been warmed up properly, you're probably going to need a cat.

edit: What does GP stand for. Maybe I'm wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by t0p_sh0tta &raquo;</TD></TR><TR><TD CLASS="quote">I agree. Change plugs, and your HC should go down.

Had the car already been warmed up before taking the test?

You NOx is high. If the car had been warmed up properly, you're probably going to need a cat.

edit: What does GP stand for. Maybe I'm wrong.</TD></TR></TABLE>

GP = gross polluter .... its in the thread title

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">

No, he's definately right.

If somebody posts which exhaust will give 'em the best sound, it'll be 8 pages long with 40 pictures, and 10 sound clips. Simple guy like this needs help passing the rape exam in CA and nobody's around.

Happens all the time.
</TD></TR></TABLE>

That's cause this so-called "tech board" is really a hang-out for 20 year old kids who are more concerned with "diss-ing" or "owning" a n00b and fawning over their bolt-ons rather than actually passing on knowledge. The funny part is that they rely on all the **** pasted up in their signatures to try convince us that they have some sort of credibility. All style - no substance.

Anyways, my experience with failed smog or emmissions tests is really limited to carbureted vehicles. Definitely do the tune-up first especially if you haven't done one in a while anyways. Make sure you include the PCV as part of it. It's hard to get to so maybe no one has done it recently. Also look for other simple things like make sure the oil filler cap is on tight and the dip stick is in good and has a good o-ring so it seals properly.

Any CELs? A bad O2 sensor could mess up your test but usually it'll throw a CEL. Make sure both O2 sensors are installed properly in your header with no leaks.

Also, clogged injectors could be a problem. You could go the cheap route and run some Seafoam or Techron through the fuel system. I send my injectors out for a cleaning and efficiency test for $50 to this guy (who does a great job): http://cruzinperformance.com/fuelinj.html

I don't really think it's your cat, you would propbably be throwing a CEL from the secondary O2 sensor (assuming your ODBII). Please specifically post your vehicle's year and model (some D-series are ODBI).

Good Luck.

 

try o2 sensor and a oil change maybe spark plug and cap and rotor
don't replace the cat yet. u r running really rich that is why ur HC is so high

 

Thanks for the support for the guys !! Yea the "tech" has really gone down hill from since i started, back then everyone would help you asap and would bump your thread now all you get is "search" !!

but yea we changed my oil about a week ago i'ma check my cat out, would my DC Header make it harder on me you think too ??

Why would it run rich ? Yea also my numbers surprised me too i was like wow iuno if they are SUPER BAD haha !!

Thanks again

Anymore input would be awesome too !!!

 

Was the car sitting before you went on the rollers? It looks like your cat wasnt warm enough . But if you cant remember when the last tuneup was then i suggest doing it.

 

Your DC header in itself does not affect your emissions. However, you need to be sure that your O2 sensor is installed properly on the header.

 

yea my car sat for some time, i had it on for a lil bit before it went on the rollers. yea i was thinkin a tune up.

O2 is installed proper

Somebody suggested earlier my car was running rich what would cause it to ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evolution-93-Ex &raquo;</TD></TR><TR><TD CLASS="quote">Yea so i failed smog yesterday all i could think of is tune up and a new cat ?
my numbers seem kinda high

Motor: 93 Ex D16Z6 188k miles, DC Sports Header

15 mph

hcmax:93 GP: 283
hc meas: 229

co% max: .57 GP: 2.07
co% meas: 1.98

no max:720 GP: 1970
no meas: 1383


25 mph

hcmax:59 GP: 233
hc meas: 244

co% max: .55 GP: 2.05
co% meas: 2.65

no max:774 GP: 1770
no meas: 731

FAIL GP



Modified by Evolution-93-Ex at 10:52 PM 10/13/2006


Modified by Evolution-93-Ex at 5:39 PM 10/14/2006</TD></TR></TABLE>

It sounds like you're running rich and that you're not getting a complete burn in your cylinders.

Suggestions:

-Fuel injector cleaning
-New spark plugs, plug wires
-Your o2 sensor isn't reading correctly
-dizzy could be going out
-Your cat isn't functioning anymore
-timing could be off, causing you to run rich
-Your engine is no longer efficient and requires a rebuild

I seriously doubt a cat is all it's gonna take to get rid of those insanely high numbers BUT it should decrease the CO and NO emissions. The hydrocarbons being high means you have unburned fuel in the air. When a hydrocarbon burns, it should produce only CO2 and H2O, and some other trace gasses in the case of gasoline.

I'd start with the tuneup, and the cat, just because it's something that you should be doing anyways on a 180k car.

 

try using few bottles of heat before the test

 

Ok got some work done to my car ! but im still afraid kinda to take it to smog (don't want to fail again) hmm also when i took it that time i just had my stock intake in, it didnt have resonator and the other tubing connected, would that have had any effect on the number also you think ??

Thanks

 

I got flamed bc i was trying to solve a guy's situation and everyone was against me yet i was the one helping him out. Then it turns out i was right and the so called "mechanics who have been working on cars for 8 yrs and racing" were wrong...
anyways...as others suggested your timing is off so i would start by checking the timing first which is fairly easy. There are many threads concerning timing so the search button helps in this case.
2nd. A good and complete tune-up helps before going to get your car inspected.
3rd. do you have a cat-back exhaust?if so, then u dont need the resonator to pass smog