Catless DP's and Smog Inspection Today...PASSED..here's how!!

newbieman78 · 01-16-2010, 06:18 PM

I've been a nervous wreck in the last week because smog inspection time was coming near and I have many mods on my car. One of these is Catless Downpipes (DP's).

I did a lot of research trying to find out how to pass and everyone just kept saying to find someone I know and to have them pass me, otherwise there is no way. Well I passed without paying off anyone.

Do bear in mind that I have the Riss Racing electronic O2 sims installed in the ECU (you DO need those)

First I erased all codes with the BT tool and i disconnected and reconnected the battery to make sure everything is wiped off as far as codes are conserned. If you don't have a BT tool just do the battery and it does the same thing as far as emission codes are concerned.

I went to have a smog inspection right away just to see what would happen and it was: REJECTED. They told me there was not sufficient data on the computer for their OBD scanner to read. They recommended driving around for a few days and going back, so thats what I did.

I put 250 miles on the car over 3 days just doing my regular everyday driving to and from work, etc.

Day of the test I went out and drove for 1 hour to make sure the engine was nice and warm. Then went to inspection and BOOM BOOM PAW, I PASSED.

Again, i don't know if i would have passed WITHOUT the O2 sims. Use this info at your own risk.

Anyone out there with catless DP's pass without o2 sims?

newbieman78 · 01-16-2010, 06:22 PM

P.S.

For those with JB3's, I made sure to drive around on MAP 0 the whole time because I am not sure if different maps could affect air/fuel ratio. Make sure you drive on stock/valet mode (MAP 0) for those 3 days before the smog inspection. Anyone know otherwise, it'd be great to know.

I hated being on MAP 0 for 3 days. So many good races I missed on the street

hun77777 · 01-16-2010, 07:48 PM

are you completely catless or still have secondary?

newbieman78 · 01-16-2010, 10:37 PM

still have secondary. They did not do visual or tailpipe smog test. It was strictly OBD test

hun77777 · 01-17-2010, 01:41 AM

what year is your car though? i still have like 2 more years left...

newbieman78 · 01-17-2010, 06:04 AM

its an 07 but here in nevada we have to have an inspection every year and they make you pay $1000 every year to register your car for the year. pisses me off. when i was in NY, it was so cheap. $50 per year or so to renew registration. i think its because there are no state taxes in nevada.

01-16-2010, 06:18 PM	#1
newbieman78 Second Lieutenant 21 Rep 274 Posts Drives: bmw 335i Join Date: Nov 2008 Location: Las Vegas iTrader: (0)	Catless DP's and Smog Inspection Today...PASSED..here's how!! I've been a nervous wreck in the last week because smog inspection time was coming near and I have many mods on my car. One of these is Catless Downpipes (DP's). I did a lot of research trying to find out how to pass and everyone just kept saying to find someone I know and to have them pass me, otherwise there is no way. Well I passed without paying off anyone. Do bear in mind that I have the Riss Racing electronic O2 sims installed in the ECU (you DO need those) First I erased all codes with the BT tool and i disconnected and reconnected the battery to make sure everything is wiped off as far as codes are conserned. If you don't have a BT tool just do the battery and it does the same thing as far as emission codes are concerned. I went to have a smog inspection right away just to see what would happen and it was: REJECTED. They told me there was not sufficient data on the computer for their OBD scanner to read. They recommended driving around for a few days and going back, so thats what I did. I put 250 miles on the car over 3 days just doing my regular everyday driving to and from work, etc. Day of the test I went out and drove for 1 hour to make sure the engine was nice and warm. Then went to inspection and BOOM BOOM PAW, I PASSED. Again, i don't know if i would have passed WITHOUT the O2 sims. Use this info at your own risk. Anyone out there with catless DP's pass without o2 sims? __________________ [SIGPIC][/SIGPIC]
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01-16-2010, 06:22 PM	#2
newbieman78 Second Lieutenant 21 Rep 274 Posts Drives: bmw 335i Join Date: Nov 2008 Location: Las Vegas iTrader: (0)	P.S. For those with JB3's, I made sure to drive around on MAP 0 the whole time because I am not sure if different maps could affect air/fuel ratio. Make sure you drive on stock/valet mode (MAP 0) for those 3 days before the smog inspection. Anyone know otherwise, it'd be great to know. I hated being on MAP 0 for 3 days. So many good races I missed on the street __________________ [SIGPIC][/SIGPIC]
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01-16-2010, 07:48 PM	#3
hun77777 Brigadier General 199 Rep 4,646 Posts Drives: SG E92 Join Date: Nov 2007 Location: Seattle WA iTrader: (58)	are you completely catless or still have secondary? __________________ SGE92TT......................... 12.331 Sec @ 117.89 Mph............................POWERED BY l BMS DCI l HELIX IC l FORGE DVs l RR OCC & CP & SCOOPS l AR 3" DPs l AE QUADs l BLISTEIN PSS10 l P3 VENT GUAGE l VISHNU PROCEDE V5 AUTOTUNE l Lots of Window Stickers
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01-16-2010, 10:37 PM	#4
newbieman78 Second Lieutenant 21 Rep 274 Posts Drives: bmw 335i Join Date: Nov 2008 Location: Las Vegas iTrader: (0)	still have secondary. They did not do visual or tailpipe smog test. It was strictly OBD test __________________ [SIGPIC][/SIGPIC]
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01-17-2010, 01:41 AM	#5
hun77777 Brigadier General 199 Rep 4,646 Posts Drives: SG E92 Join Date: Nov 2007 Location: Seattle WA iTrader: (58)	what year is your car though? i still have like 2 more years left... __________________ SGE92TT......................... 12.331 Sec @ 117.89 Mph............................POWERED BY l BMS DCI l HELIX IC l FORGE DVs l RR OCC & CP & SCOOPS l AR 3" DPs l AE QUADs l BLISTEIN PSS10 l P3 VENT GUAGE l VISHNU PROCEDE V5 AUTOTUNE l Lots of Window Stickers
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01-17-2010, 06:04 AM	#6
newbieman78 Second Lieutenant 21 Rep 274 Posts Drives: bmw 335i Join Date: Nov 2008 Location: Las Vegas iTrader: (0)	its an 07 but here in nevada we have to have an inspection every year and they make you pay $1000 every year to register your car for the year. pisses me off. when i was in NY, it was so cheap. $50 per year or so to renew registration. i think its because there are no state taxes in nevada. __________________ [SIGPIC][/SIGPIC]
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