emissions test failure....help please

MERCCLK6 · 04-18-03, 01:31 PM

my car failed the emissions test today ...here are the possible reasons
1.egr
2.coolant
3.spark plugs
4.air filter
5 cat converter
what does the egr do and its purpose

arthurc · 04-18-03, 09:51 PM

Exhaust Gas Recirculation System feeds a small amount of the exhaust gases back into the intake to be reburned which basically makes sure that all the fuel is burned. I think its controlled by a solenoid or two. Other than that each car has its own timing of when its used, mostly at cold start and during idle.
AC

theGodfather · 04-19-03, 06:35 PM

Which particular emission did it fail and by how much?

You should ahve a paper telling you:

HC
CO%
NOx

Depending on which one is high, it changes the scenerio of what could be wrong with your car.

For example I failed mine too... but my HC ppm and CO% are extremely on the low end well within limits while my NOx ppm is more than double the limit!

The more info you can give us, the better for us to help.

G

MERCCLK6 · 04-20-03, 02:26 AM

the no2 failed

theGodfather · 04-20-03, 02:40 AM

Welcome to my situation

I've been battling the causes of my NO to fail.

By how much did it fail? Any check engine light on?

From what I have researched the #1 reason for NO to be high is EGR system failure (its purpose is to keep NO low) and/or bad cat. NO is caused by high combustion temperatures. However some members had EGR systems not working and PASS the emissions test... strange.

There is already discussion of ideas to try and what to do for my situation (same thing like yours) in this thread:

Failed 'functional' Ca. emission test (EGR) ???

The thread was first about cleaning out an EGR system and if you continue towards the end, there is discussion of what to try. Some good info there IMO.

G

bicsintegra · 04-20-03, 01:32 PM

no2 failure in my experience was the cat on my integra it maybe different with the legend though.

04-18-03, 01:31 PM	#1 (permalink)
MERCCLK6 Registered User Join Date: Jan 2003 Location: MARYLAND Posts: 115 Car 1: 93 l sedan iTrader: (0)	emmisions my car failed the emissions test today ...here are the possible reasons 1.egr 2.coolant 3.spark plugs 4.air filter 5 cat converter what does the egr do and its purpose

04-18-03, 09:51 PM	#2 (permalink)
arthurc Registered User Join Date: Feb 2003 Location: Seattle Posts: 33 Car 1: 1994 LS Coupe iTrader: (0)	Exhaust Gas Recirculation System feeds a small amount of the exhaust gases back into the intake to be reburned which basically makes sure that all the fuel is burned. I think its controlled by a solenoid or two. Other than that each car has its own timing of when its used, mostly at cold start and during idle. AC __________________ ------------------------------------------------------------------------- 1994 Black/Black LS Coupe 18" Rozzi Zymox Chrome Wheels On 225/40's (summer) 18" Konig Tantrum Silver Wheels On 225/40's (winter)

04-19-03, 06:35 PM	#3 (permalink)
theGodfather "the Don" Join Date: Jan 2002 Location: Toronto, ON, CANADA Posts: 989 Car 1: 1995 Carbon Black Metallic 6-Speed Coupe iTrader: (2)	Which particular emission did it fail and by how much? You should ahve a paper telling you: HC CO% NOx Depending on which one is high, it changes the scenerio of what could be wrong with your car. For example I failed mine too... but my HC ppm and CO% are extremely on the low end well within limits while my NOx ppm is more than double the limit! The more info you can give us, the better for us to help. G __________________ 1995 Legend Coupe 6-speed Carbon Black Metallic 208 WHP @ 6250 RPM 189 FT/LB @ 5250 RPM MUSTANG Dyno 260,000mi and counting WeaponR Secret Weapon Intake - Cold Air Box - Custom 2.5" stainless exhaust system - Remus Rev3 Universal muffler -SPEC Stage II clutch - 5speed flywheel - SR5GUY Chip - APEXi S-AFC - Pullies - MLS copy strut bar - Short Shifter -18" ICON W65 Wheels - KONI reds/Ground Controls - Slotted Brembo Rotors - SS Brake lines - Walbro 255 -ICE

04-20-03, 02:40 AM	#5 (permalink)
theGodfather "the Don" Join Date: Jan 2002 Location: Toronto, ON, CANADA Posts: 989 Car 1: 1995 Carbon Black Metallic 6-Speed Coupe iTrader: (2)	Welcome to my situation I've been battling the causes of my NO to fail. By how much did it fail? Any check engine light on? From what I have researched the #1 reason for NO to be high is EGR system failure (its purpose is to keep NO low) and/or bad cat. NO is caused by high combustion temperatures. However some members had EGR systems not working and PASS the emissions test... strange. There is already discussion of ideas to try and what to do for my situation (same thing like yours) in this thread: Failed 'functional' Ca. emission test (EGR) ??? The thread was first about cleaning out an EGR system and if you continue towards the end, there is discussion of what to try. Some good info there IMO. G __________________ 1995 Legend Coupe 6-speed Carbon Black Metallic 208 WHP @ 6250 RPM 189 FT/LB @ 5250 RPM MUSTANG Dyno 260,000mi and counting WeaponR Secret Weapon Intake - Cold Air Box - Custom 2.5" stainless exhaust system - Remus Rev3 Universal muffler -SPEC Stage II clutch - 5speed flywheel - SR5GUY Chip - APEXi S-AFC - Pullies - MLS copy strut bar - Short Shifter -18" ICON W65 Wheels - KONI reds/Ground Controls - Slotted Brembo Rotors - SS Brake lines - Walbro 255 -ICE

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04-20-03, 02:26 AM	#4 (permalink)
MERCCLK6 Registered User Join Date: Jan 2003 Location: MARYLAND Posts: 115 Car 1: 93 l sedan iTrader: (0)	the no2 failed

04-20-03, 01:32 PM	#6 (permalink)
bicsintegra Registered User Join Date: Aug 2002 Location: Ellenwood,GA Posts: 2,369 Car 1: rebuilding '91 coupe, iTrader: (0)	no2 failure in my experience was the cat on my integra it maybe different with the legend though.

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