i have till the end of december to pass smog and i just failed my free retest here are my results(first run) 9/25

%CO2 %02
MEAS MEAS
14.2 .3
14.3 .3

HC (PPM)
MAX gp MEAS
130 305 120
105 255 102

CO (%)
MAX gp MEAS
0.80 2.30 0.55
0.69 2.19 0.45

NO(PPM)
MAX gp MEAS
835 2054 2466
774 1854 2058


^all with out doing any modifications to help smog (thought it would pass no problem)


v After i installed a aftermarket cat (used by a buddy) mashed the gas for about 20 min and kept the engine running for about 30 min while i waited, 1/4 tank of usa gas. 5000 mile since last oil change. 12/ 15

%CO2 %02
MEAS MEAS
14.4 .5
14.6 .2

HC (PPM)
MAX ave MEAS
130 31 124
105 20 68

CO (%)
MAX ave MEAS
0.80 0.10 0.44
0.69 o.09 .26

NO(PPM)
MAX ave MEAS
835 237 2000
774 199 1003

i cant seem to get around no(ppm). should a put a second cat under the car? would a oil change help it? new o2 sensor? i just cant afford to send money on my car the dosent need ot be spend bcause of xmas around the corner... help a guy out thanks!

 

well, I would check the O2 sensor first sounds like it might not be working correctly with that high NO.
Here's what I do before every smog check(have yet to fail) in order of least to most drastic:
Run the G2P stuff from like auto zone
fresh oil change
new/very recent tuneup(plugs, wires, cap & rotor)
fuel system cleaner
as low of octane as the setup can handle
adjust timing back to stock(if modified)
as few performance parts as possible(this includes OEM type R stuff)
make sure O2 sensor is working correctly(if i smells like the car is running a little rich I replace it)
newer cat(if I can smell it running really rich I normally replace it with a high flow cat, if the o2 doesn't fix it first)
PRAY lol

 

just bought the o2 sensor.. now how do i get a socket over it? ( i dont wanna break anything, and im a motor noob)

 

well you've got 2 choices, pepboys and similar stores offer an o2 specific wrench, or you can use a flare nut wrench on it(a normal wrench can work too, but I've had beter luck with flare nut)...I normally let the motor get to normal operating temp, then spray some PB blaster (liquid wrench type stuff) and go for it...the warmer the o2 bung is the easier it typically comes out...unless somebody was an idiot and used JB weld on there(like the previous owner did to my stock header ...dumbshit ricer, can't get it off even by using a torch on that SOB)