I tried to smog my 2.2 gt and I failed. Here are the numbers if anyone can tell me what they think. The guy says that he thinks it is my O2 censor(1st one).
Anyway he is test only so it is up to me to get her done.

-----------------CO2 - %o2 --------[ HC (ppm) ] --------- [ CO2 % ] ----- ---[ NO ppm ]
test-- -rpm-- meas---meas---max--ave--meas==-max--ave---meas---max--ave--meas------results
15mph 1881 - 14.4 - 0.2 - --60 --- 9 - - -12 -- --- 0.53 - 0.02- 0.24 - - 459 - 57 - 576 - --- FAIL
25mph 2091 - 14.3 - 0.2 - -- 43 --- 7 --- 23 ----- 0.51 - 0.03 -- 0.19 - 746 - 50 - 530 ---- PASS

I was also wondering if anyone has experience with which o2 sensors are the best. The guy says get toyota only. Mabey one of these?
http://www2.partstrain.com/store/?PN=42949...ND(universal:0)

Mabey one good one and one cheap one. Usually if I don't pass smog I get a new cat converter but he thinks the cat is ok.
I gave it a complete tune up (wires cap ect.) about a year ago but nothing lately.

Thanks for any advice


Trying to stay away from this:
http://www.trademotion.com/partlocator/ind...amp;catalogid=2

This post has been edited by xrav22: Oct 12, 2009 - 8:18 PM

I found this in another forum and thought I would post it. Moral of the story a new cat will drop NO alot. I guess i will try new plugs, high octane gas, and high psi in tires before I breakdown and buy the cat.


"I would first like to thank Mike and Matt for their replies.

It took several weeks of sporadic spare time repair work, but I was FINALLY able to get my 1989 LeBaron to pass the California SMOG test…and WITHOUT paying a mechanic to diagnose it for me. I did, however, have the help of a very knowledgeable amateur mechanic friend.

After I replaced a missing heated inlet air system connector tube (which transfers heated air from the carburetor air heater chamber back to the air cleaner), my friend and I used his vacuum pump/gauge to verify that the EGR valve was both receiving the proper amount of vacuum and responding appropriately. Next we checked out the voltage and impedance on the four connectors on the oxygen sensor connector and found the output voltage to be too low, so we replaced the valve, bought from oxygen-sensor-warehouse.com for $39.75 w/ free shipping (A word of caution- we had to heat up the engine a bit in order to expand the female threads in the exhaust manifold to release the oxygen sensor threads and then had to use a special split deep socket that allows the sensor wires to exit through the split in the socket while the sensor was being rotated and tightened into place.) Hoping that these two corrections would resolve the high NO levels, I then took the car back in for my one free smog retest. The good news was that the NO levels were not as high as before. The bad news was that the NO levels were still too high and the car failed the retest. Having saved the most expensive remedy for last, I bit the bullet and had my old 2-way catalytic converted replaced with a new 3-way one for $140 parts/labor and took the car back in and paid for a new smog inspection. This time the CO2 levels rose slightly (apparently still within spec), but all the other test emissions were lower, with NO being dramatically lower. The third time was the charm and I passed. Here are the results of my 3 smog tests:

1- after rebuilding the head but before doing any emissions systems repair
2- after replacing the air inlet heater tube and oxygen sensor
3- after replacing the catalytic converter

MPH/ %CO2 %O2 HC(ppm) CO (%) NO (ppm) RESULTS
RPM MEAS MEAS MAX AVG MEAS MAX AVG MEAS MAX AVG MEAS
1- 15/1646 14.6 0.2 118 31 86 .75 .10 .32 799 237 1181 FAIL
25/1869 14.7 0.2 93 20 73 .63 .09 .27 738 199 1124 FAIL

2- 15/1612 13.8 0.9 118 31 87 .75 .10 .37 799 237 1033 FAIL
25/1826 13.9 0.9 93 20 73 .73 .09 .32 738 199 874 FAIL

3- 15/1563 14.6 0.2 118 31 14 .75 .10 .05 799 237 87 PASS
25/1867 14.6 0.1 93 20 9 .63 .09 .04 738 199 112 PASS

I guess the moral to the story is, if your engine develops a head gasket leak that enables coolant to get into the combustion chamber and you have antifreeze in your cooling system, your catalytic converter could very well be damaged beyond repair."

my head was bad for 2yrs. i was overheating a lot and definitely coolant is getting burned. luckily i still managed to pass smog even if it was overheating and waited 6 months before it got fixed