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Failed Smog Check Emissions Test California Nissan 300zx Co(ppm) Vir

I am so disspapointed. Today I took my 300zx for smog check and it failed. the NO (PPM) failed:

MAX AVERAGE MEASURED
---------------------------------------------
15 mph 424 57 787
25 mph 711 50 1008

They guy at the test station told me i may need a new catalytic coverter or check my EGR.

Before taking my car for the smog check, i had a bad O2 Sensor. I repaired it, after I repaired it (had broken tip), the light did not come back on.

These are the possible problems:

bad o2 sensor
bag EGR valve
bad cat
bad timing
dirty injectors

I will post my results with what i did once i pass this stupid test.

------------ 2 days later ------------
I dediced to check the catalytic coverter per the advice of the tech at the emission place. I had to remove the exhaust to check this. When I removed the exhause i saw that one of the Oxygen sensors was broken. So i dediced to replaced both of them with new one.

02 sensor


as you can see from this picture, both of my catalitic coverters are in good shape, now i know that its not the cats.
catalytic converter

I checked the EGR valve as is operational, according to the manual, i am soupposed to left up the diagfram and the engine should stall, and it did.

I replaced both PVC valves.

next: i wanted to do a fuel injection mysefl, but after reading how to do this, i need special expensive equipment, better just to take it to a shop to do this. I had to do a fuel injection cleaning on a toyota celica once in 1992 and they shop charged me $59 bucks. I bet this is going to cost me like $159 dollars now.. we'll see.. (i looked for a place to do the fuel injection cleaning but found none, so i didn't do this)

TWO WEEKS LATER ------------
I went back to the place where I failed t e emissions test the first time because they give a free retest. I was nervous taking the car back because I didn''t have to deal with taking the car to an auto shop for only for them to tell me its going to cost me like some $2,500 to fix it...

As I took the car back to the testing facility, I let the car idle for like 5 minutes before telling them to start the test, this way the catalytic converters will be hot thus burning the pollutions better. As the technician started to do the test, I prayed to Jesus for the car to pass the test. after about 7 minutes, I was relived when the guy at the emission test facility gave me a thumbs up. I remembered my prayer to jesus at that moment and thanked The Lord Jesus Christ.

at the end, I think my car failed because of the ba o2 sensor, you see, prior to taking my car for the test, I had replaced the engine with a JDM engine because the old one broke the timing belt and in the process it broke the whole engine.. Anyway, before I replaced the engine, my car had the check engine lamp (light) on with a o2 sensor code. When I removed the exhaust I found the passenger side o2 sensor was broken, the terminals were bent, so I thouhgt by straiting it it would fix it. After fixing the o2 sensor, the check enginee light went off so I thought it was fixed... Because I was cheap and not replacing it when I should have, I had to go through this ordeal.

its been about two weeks since i failed the smoge check and have done the following to prepare for the re-test:

* Changed the two rear Oxygen (o2) sensors
* Changed The Oil
* Changed Fuel Filter

I passed the test !!!!

Finally, I am so thankful that I don't have to deal with this for the next two years.

------ UPDATE July 10 2008 ---------

well, its been 2 years since i went trhough this whole ordeal. and yet again, when i went to the smog check station i fail.

i gave my car a tune up and still failed.

finally, i checked my computer for any errors, there was a p0325 error which is the knock sensor. i replaced it and then i passed the test on the third try


this is what the paper said:


Emissions Control Systems Visual Inspection/Functional Check Results
(Visual/Functional tests are used to assist in the identification of crankcase and cold start emissions which are not measured during the ASM test)
      
Result
ECS
Result
ECS
Result
ECS
PassPCVN/AThermostatic Air ClearnerPassFuel Evaporative Controls
PassCatalytic Converter N/AAir Injection PassMIL/Check Engine Light
PassEGR Visual PassVacuum Lines to Sensors/Switches PassCarb./Fuel Injections
N/AEGR Functional   PassOther Emissions Related Components
N/AFuel Cap Functional N/AIngition Timing   
PassFuel Cap Visual PassWiring to Sensors PassOxygen Sensor
PassSpark Controls N/AFillpipe Restrictors PassLiquid Fuel Leaks
N/AFuel Evaporative Controls Functional     


1st Try - FAILED - on the first try i changed the sparkplugs, air filter, PVC valves - FAILED

%C02%02HC (PPM) CO (%) NO (PPM)
TestRPMMEASMEASMAXAVEMEASMAXAVEMEASMAXAVEMEASResults
15 mph 169914.70.052910.490.020.0242457879FAIL
25 mph 189014.70.036710.460.030.02711501009FAIL


2nd Try - FAILED - on the second try i flushed the oil, changed the oil and oil filter, cleaned the intake with intake spray

%C02%02HC (PPM) CO (%) NO (PPM)
TestRPMMEASMEASMAXAVEMEASMAXAVEMEASMAXAVEMEASResults
15 mph 174814.60.052980.490.020.0242457766FAIL
25 mph 187314.50.136780.460.030.0271150596PASS



3rd try -PASSED - i changed the two 02 Sensors and the knock sensor. i was getting a p0325 on the knock sensor so i replaced it, this time it passed the test. as you can see there is a big difference. the knock sensor is important because it affects the timing. so if your timing is incorrect, your engine can be running lean.. which means that its running more gasoline than air in the air/gas ratio. im not sure if the 02 sensors were necessary to change, but i didnt take any chances, they cost me about 75 dollars each, and the knock sensor was $189 dollars.


2008%C02%02HC (PPM) CO (%) NO (PPM)
TestRPMMEASMEASMAXAVEMEASMAXAVEMEASMAXAVEMEASResults
15 mph 169914.70.052910.490.020.0242457106PASSED
25 mph 189014.70.036710.460.030.027115083PASSED




Aug 27, 2010%C02%02HC (PPM) CO (%) NO (PPM)
TestRPMMEASMEASMAXAVEMEASMAXAVEMEASMAXAVEMEASResults
15 mph 170414.40.1529510.490.020.0642457133PASSED
25 mph 276914.50.1367240.460.030.0471150462PASSED


Why do you think you failed the test?

mas Fri May 25, 2012
California continues to change the emissions maximums on particle matter in vehicles. A vehicle with 10 years will start to fail on a regular basis.
Majority time can get away with O2 sensor and slight tune up. In my opinion after speaking to techs California wants to get rid (off the road) of the older vehicles.
JOAQUIN Thu Dec 30, 2010
youtube dot com /wa VIDEO NOVELA EL EMBRUJO DE ALHAMBRA
Mrs. Wed Dec 15, 2010
Visit WeFixGasMoney dot com to learn more about XFT. I have had 3 vehicles fail emissions but after using XFT I passed.
Al Fri Nov 19, 2010
Did you have to reset the ecm after replacing the o2 sensors?
marlene Thu Feb 11, 2010
this example with all of the test results was exactly what I needed. thank you so much. I'M OF TO CHECK MY 02 SENSORS.
will report my results too.
Jesus Wed Mar 25, 2009
it was the praying, not replacing the broken o2 sensor.
why fix anything? i did it all for you. just pray to me and i'll turn your car to gold next time.
Carin Wed Feb 25, 2009
i failed the test because the no (ppm) read: 1023 & 1056, also my check engine light is on and giving the codes for a speed sensor malfucntion and a knock sensor malfuction. any advice? i am taking the car in next week to be fixed.
luis Sun Feb 08, 2009
the o2 sensors on my 300zx 93' but i need to locate them first where eare they?
tommy Sat Feb 07, 2009
my truck failed smog test in california how can i fix it
Larry Sat Jan 17, 2009
i drive 1986 nissan pickup (z24 four-banger w/8 spark plugs)with 310,000 miles on it. it runs great, i have always keep it in top condition. two years ago it passed the smog and the guy said it was like a "new car." this time no dice. before test i changed the oil and air filters, the oil, filled up the tank and added injector cleaning additive. ran the truck 15 minutes to heat up properly. truck failed test. then i replaced the engine block 02 sensor. still failed. now i will replace the pcv valve. (note: the cat converter was replaced three or four years a go with a cheap imported cat converter. a friend tells me it is probably not the egr assembly but rather the cheap cat converter has failed. the smog guy has an affiliate next door who diagnosis failed vehicles with a $79 diagnostic test. i have already spent over a $100 on tests and re-test plus a new 02 sensor which i replaced myself.
ann Thu Oct 23, 2008
semi-related question - can an emmissions test cause a gasket to blow?
Tuan Mon Jun 16, 2008
thx for your time posting this up. it really help me on my process for the smog test =]. because i'm in the same situation you were in. i owned a honda civic 01 . but when i went to smog it, it failed the test =/ && i'm not sure what's the problem. i'm still on the process to figure it out.
javi Thu Apr 03, 2008
la recomiendo se disfruta con las dos historias mi enora buena ala escritora maria villamayor
LUCAS Mon Dec 31, 2007
larecomiendo el " embrujo de alhambra"
VERO Fri Dec 07, 2007
la recomiendo por mil............ el "embrujo de alhambra"

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