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12-19-2005, 12:20 AM
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500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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It was a dybo test. i was thinking the o2 sensor too. ill check all this out tommorow. thanks!! i need to get the nox down thou lol...the hcs and cos arent that bad. waht causes nox to be high?
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01-31-2006, 09:29 PM
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#2 |
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500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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Went to reinspection today...new bosch o2 sensor, tuneup, car runs great. failed even worse this time. i dont know whats wrong with the car...im gona try a better o2 sensor and im getting a new cat soon.
 nox - 3252/1110 HC - 255/148 co - .87/.83
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Yay the supra assistant is gone!!! WEEE!! |
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02-01-2006, 01:33 AM
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1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
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High NOx is caused by the EGR system not working. A bad valve, modulator (or both), or plugged passages (or all of the above).
Mine was the passages. The way its set up, and if they've never been cleaned out, I'd say that it a very likely cause. See my earlier post. If you are pretty mechanically inclined, you'll see how to clean them out as you remove the valve, and the little cover on top of the intake manifold. Use a vacuum cleaner and a coat hanger/screwdriver to scrape it out.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
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04-16-2006, 02:25 PM
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#4 |
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500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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What if I just run a stainless steel line from my exhaust back into the intake with a ball valve? haha. Im getting kinda frsutrated with this emissions thing. I do need a new cat thou. I cant get that egr cover off....took the bolts out and it was stuck there like it was welded
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Yay the supra assistant is gone!!! WEEE!! |
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05-26-2009, 04:12 PM
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Stock
Join Date: Feb 2009
Location: North Jersey, USA
Posts: 9
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Fellas,
nice to read some SMOG notes, we've had a hullava time getting 'ol 1987 NA automatic to pass the high idle 2500 rpm test, HCs at 120 with limit 100. Did a induction cleaner for 1 hour, drip drip drip, retarded the timing to 5-BTDC, and squeaked by at 95 HCs. Also in the tank now is Super, and the injection cleaner stuff. We have a knock sensor code 52 which plan on doing the rewire for today, but the NJ purple 2011 sticker never looked so nice. I think a EGR cleaning is in order. -hansey in Paramus 
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