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03-13-2009, 04:55 PM
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#1
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10 Second Club / Meet Coordinator
Join Date: Dec 2004
Location: Roxbury, NJ
Posts: 2,135
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failed inspection for CO
welp, today i fired up the iroc for the first time since november.
i let it idle for 10 mins, drove it for 15, let it sit, then drove it for another 1.5 hours. got a fresh tank of 89 gas, no studdering or anythign noticeable at all.. pulled up to the inspection station in Plainfield NJ, waited 30 mins, i could smell the exhaust and thought, damn i'll fail
went in, passed for everything EXCEPT CO levels
NOx : standard . 1146 mine 418
HC standard: 152 mine 131
Co standard .86% MINE 3.54% fail
WONDERING WHAT CAUSED this.. i read on one forum that it might be oil int he combustion chambers.. but i havnt had this problem ever, oil level is always good
maybe it was that the car had sat with stabil in it for 5 months.. or maybe that the cat is about 6 yrs old..
i just need the car to pass and get the sticker, so i can get rid of my Edelbrock headers (leaking bad) and tha AIR tube setup.. and install my Dyno Don's headers with new y pipe and new cat...
damn, any dieas suggestions!??!
it was AWESOME driving the car around for a few hours today tho, been a while!
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1987 IROC-Z - modified
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03-13-2009, 07:08 PM
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#2
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12 Second Club
Join Date: Mar 2009
Location: metuchen, nj
Posts: 1,476
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why not just go to a private inspection place thats a little shady
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03-13-2009, 07:15 PM
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#3
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,165
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Your headers are leaking bad?
IIRC excessive CO is often from a rich condition.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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03-13-2009, 09:25 PM
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#4
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Join Date: Apr 2007
Location: Brick, NJ
Posts: 39
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I gotta take my car for inspection this month too. I hope you are able to get yours to pass. Maybe this graph I found that shows AFRs and the levels of different emissions gasses can be of some help.
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03-13-2009, 10:24 PM
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#5
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Join Date: Mar 2008
Location: Shreveport Louisianna Barksdale AFB
Posts: 1,415
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lean it out a bit and sea foam that biatch and youll pass.
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USAF Jet Propulsion Specialist
 1985 383 Camaro-nothing special I promise 
2000 NBM z28-also nothing special
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03-14-2009, 12:41 AM
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#6
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Join Date: Dec 2005
Location: Boston/North
Posts: 9,214
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Seafoam time
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Quote:
Originally Posted by BonzoHansen
dumbass.
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03-15-2009, 05:06 PM
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#7
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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Incomplete combustion - tune up time with fresh gas and oil change, double check your timing.
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JSSPEEDANDCUSTOM.COM
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03-19-2009, 12:18 PM
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#8
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10 Second Club / Meet Coordinator
Join Date: Dec 2004
Location: Roxbury, NJ
Posts: 2,135
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ok, took it to a local mechanic i know, he quickly did a look over and noticed a vacum leak, we then adjusted the timing, and put it on the machine... all the levels came down...
NOx standard 1146 mine 23
HC standard 152 mine 74
CO standard .86% mine .. .39% = PASS
so, i probably could have found it myself, but I had a bad vacum line/connection...
so, now I have a disgusting looking light purple sticker on the car 3/2011.. but at least I know the car is running good..
im probably going to do seafoam anyways over the summertime, and once the new headers go on, a magnaflow cat.. or maybe no cat.. as well as fuel filter, A.I.R. system delete, driveshaft loop, replace speedometer gears, undercoating/rustproofing, and getting the stripe design worked out and put on the car.
thx for the help and advice everybody.. hope to see people soon at a meet
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1987 IROC-Z - modified
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03-19-2009, 01:37 PM
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#9
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,165
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Cool! Good news.
Seafoam before you change the cat, then put the new cat in with the new exhaust. The 3hp you lose is not worth the problems.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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