here is the thing i went to the state ref for modified emissions, so i fixed everything and put the car back to stockbut the test still showed i had a high O2 level and a low Co2, sowmthign about the hydro carbons and the Nox, so if any one has any answers p[lease help, oh its a 1994 civic ex


Modified by 94oemcivic at 2:33 PM 2/16/2005

 

check your cat.

 

i have a brand new cat

 

tune up? very basic stuff..... wanna let us know your results so we can help you a bit more?

 

is it a racing cat?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94oemcivic &raquo;</TD></TR><TR><TD CLASS="quote">here is the thing i went to the state ref for modified emissions, so i fixed everything and put the car back to stockbut the test still showed i had a high O2 level and a low Co2, sowmthign about the hydro carbons and the Nox, so if any one has any answers p[lease help, oh its a 1994 civic ex


Modified by 94oemcivic at 2:33 PM 2/16/2005</TD></TR></TABLE>
How about your o2 sensor, and spark condition, not to mention your cat?

 

your car is running lean. check fuel pump, filters and injectors. if your nitrides of o2 (nox)are high then you might have a timing problem but it is also caused by lean conditions. your cat is working fine especially if your hydrocarbon emissions were low, also a sign of leaning out. co2 is the result of fuel and o2 mixing if your running lean then your co2 will be low.

 

Also, you should try to find a smog tester who knows how to drive it right. Your rim size and having low profile tires factors in.

 

wtf does tire size have to do with the smog test?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Transformer &raquo;</TD></TR><TR><TD CLASS="quote">Also, you should try to find a smog tester who knows how to drive it right. Your rim size and having low profile tires factors in. </TD></TR></TABLE>

only if you're on a dyno, and even if you are, the engine speed will barely vary due to tire size.

 

the thing is my dad is a master mechanic, we fine tuned that bitch down to the bone its running stock time idle throttle everything its like perfect and its not a racing cat its brand new stock, so im not real sure i guess ill check the fuel pump injectors and filters, thanks for the input

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by baseballinmyass &raquo;</TD></TR><TR><TD CLASS="quote">wtf does tire size have to do with the smog test?</TD></TR></TABLE>
lols

 

brand new o2 sensor brand new cat brand new spark plugs

 

i just dont see what tire size has to do with engine performance; maybe you could illustrate.

 

Was your car at normal operating temp during the testing?

 

yea, was the car warmed up?

 

pay that guy off bro worked for me...i wish

 

can you by chance post your results? exact numbers of each at idle and 2500 or whatever they test it at? also before you go again change the oil and drive it before you go and DONT turn the car off while you're waiting in line. the warmer the cat the better

 

has anyone passed with a motor with out a cat.......like sohc vtec, b-series non/vtec??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civicr2gs5 &raquo;</TD></TR><TR><TD CLASS="quote">has anyone passed with a motor with out a cat.......like sohc vtec, b-series non/vtec??</TD></TR></TABLE>

highly doubt it.

To the original poster, do a basic tune up and make sure the car is warmed up and up to operating temperature.

 

%CO2 %O2 HC (PPM) CO2(%) NO (PPM)
TEST RPM MEAS MEAS MAX GP MEAS MAX GP MEAS MAX GP MEAS
15m 1869 11.7 4.3 92 281 167 0.55 2.05 0.10 716 1961 4211
25m 2026 12.3 3.5 57 321 75 0.54 2.04 0.01 764 1761 3780