Originally posted by M13
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Bc: Aircare Omg!!!!!!!!
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It's O2 sensor.
I finally got it off. Man that was tough...
Took the entire downpipe/turbo elbow off then vise gripped the stripped nut, turned the exhaust pipe around. Voilla.
After a test drive, my car DOES NOT backfire as bad it used to, and it pulls so much better! (Plus my exhaust fumes smell less )
I'll keep you updated after I go for Aircare. Round 5.
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Changed my O2 sensor to a brand new NTK one on saturday... took the car for aircare today and still failed.
Hydrocarbons reading was WORSE than before I replaced the O2 sensor by about 0.10
Mind you I was running 92 instead of 94 because I needed gas bad and the Chevron's system was down so I had to use 'Super Save' gas, but it can't make it that much worse can it?
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So to follow up.
I found out WHY my car was failing hydrocarbons.
... after spending hours under my car, hours infront of the car while idling, hours infront of the car while off, hours driving, over 7 attempts at aircare FAILING.
#1. My car was tuned richer than stock (I guess the previous JDM owner knew his **** and made sure it never leaned out
#2. I should have tried lower octane gas but it has to be good stuff like Mohawk(apparently cleaner?)
#3. More methyl hydrate!!
#4. I had a bad boost leak, making my already rich tune richer. I have no vacuum leak, but boost leak FOR sure. I fixed it, and now car doesn't backfire as it used to.
#5. I lucked out at aircare with a person that figured out NOT to stall my car on the dyno and stopped missing gears.
#6. I replaced my O2 sensor, then a few weeks later before the aircare I cleaned off any carbon residue on the sensor for a good measure.
whew. I don't have to deal with this for 2 more years now.
I hope these information above help any of you who have any problems with our cars not passing air care in terms of hydrocarbons. With a working cat, your CO and NOx should be guaranteed to pass.
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mine fail with these readings:
HC(0.5000)allowable } my reading : 0.7972 FAIL
CO(9.3200)allowable} my reading : 5.6876 PASS
NOx(1.2400)allowable } my reading : 1.3607 FAIL
Im goin to clean my plugs and regap to .9
clean O2 sensor , use seafoam 1/3 of can to engine ,1/3 to oil then go for a good spirited drive for 15 mins. then use the 1/3 of a can into my gas (using 91 octane ) . then do oil change . then a long drive to abbotsford aircare center . And hopefully pass this stupid aircare.
Ill let you guys know my results tommorowA BIRD ON YOUR HAND ** **** ON YOUR WRIST
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Anyways, been super lazy to take my car back to aircare after my coolant leak incident, but i guess it saved me from taking it back not realizing that i had no cat converter lol. Website states that all 92+ must have a catalytic converter. Im currently running with a dmax cat delete dp and greddy cat back. Well my question is, have any of you passed without a catalytic converter? or does this mean i have to source out a stock exhaust system w/ cat converter to pass air care?
thanks,
the noob1992 R32 GTS-T Type M
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