okay, i went to go take an emissions test today on my 89 crx si, but i failed...

i passed everything on the 50/15 test, as well as the gas cap test.

but i failed on my 25/25 tests except for NOX ppm(nitrous oxides).

my reading for the HC ppm(hydro carbons) was <U>264</U> w/ the allowed reading of <U>239</U>.

and my CO%(carbon oxides) read <U>5.82</U> w/ the allowed <U>1.54</U>.

the emissions inspector suggested that it could be either the head gasket, or exhaust gasket needs to be replaced... what do yall think?

 

thats high co...think that is an 02 sensor cause if passed at 15 with cat and failed at 25 and the cat is even hotter then makes me think its your o2 sensor

 

THANK YOU!

i suggested to the damn inspector and he just shook his head. so if thats whats throwin off the CO... wheres the HC comin from?<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yz125rider21 &raquo;</TD></TR><TR><TD CLASS="quote">thats high co...think that is an 02 sensor cause if passed at 15 with cat and failed at 25 and the cat is even hotter then makes me think its your o2 sensor</TD></TR></TABLE>

 

more help on this plz!


also...i called around for a price for a new 02 sensor. autozone has em for 60 bux i think. but ive had a couple ppl tell me that they wont work, that id have to get the oem 02 sensor from a dealership. im confused. plz help

 

also sugest warming the cat up too??? or did you do that right before machine????cause I had a tough time passing but I just seafoamed the **** out of my motor and retarded the timing...look for my smog page and you will see I failed horribly...you aint to bad really just looks like the o2 sensor is bad or bad connection to it.

 

High NOx typically results from too hot or too lean a mixture on the intake. You don't have that problem.

High HCs typcially result from incomplete combustion, or from too rich a mixture. If you have a kewl aftermarket FPR, replace it with a stocker. Chances are the aftermarket ones are rising-rate regulators, because they're supposed to make MADD POWAH YO! And mostly what they do is richen the mixture at higher throttle settings...

Check your ignition system and make sure it's in good working order. You're only a little over on the HCs, so just a little help should get the levels down.

High CO2 can be due to a rich mixture, but not always...

--DD

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yz125rider21 &raquo;</TD></TR><TR><TD CLASS="quote">also sugest warming the cat up too??? or did you do that right before machine????cause I had a tough time passing but I just seafoamed the **** out of my motor and retarded the timing...look for my smog page and you will see I failed horribly...you aint to bad really just looks like the o2 sensor is bad or bad connection to it.</TD></TR></TABLE>yea it was warmed up prior to the machine. anyway u can tell if a 02 sensor is bad?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_Darling &raquo;</TD></TR><TR><TD CLASS="quote">High NOx typically results from too hot or too lean a mixture on the intake. You don't have that problem.

High HCs typcially result from incomplete combustion, or from too rich a mixture. If you have a kewl aftermarket FPR, replace it with a stocker. Chances are the aftermarket ones are rising-rate regulators, because they're supposed to make MADD POWAH YO! And mostly what they do is richen the mixture at higher throttle settings...

Check your ignition system and make sure it's in good working order. You're only a little over on the HCs, so just a little help should get the levels down.

High CO2 can be due to a rich mixture, but not always...

--DD</TD></TR></TABLE>
naw...its a stock *** d16a6. no mods period besides bein lowered on s-techs

 

yeah, the way to tell if an o2 sensor is bad is if the ecu throws a code/check engine light

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KFBhonda &raquo;</TD></TR><TR><TD CLASS="quote">yeah, the way to tell if an o2 sensor is bad is if the ecu throws a code/check engine light</TD></TR></TABLE>
ive tested a few in the past by usin a voltmeter...but i dont have one lyin around anymore.