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04-28-2006, 05:48 PM
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#1 | |
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AF Newbie
 Join Date: Jun 2004
Location: Pemberton, New Jersey
Posts: 14
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Emissions fail, NOx - 1226
I have a 91 Bonneville LE, which failed Emissions inspection for NOx, reading 1226. Anybody have any idea what could be causing the problem?
Thanks. |
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04-28-2006, 06:44 PM
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#2 | |
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Pontiac Guy
 Join Date: May 2004
Location: Penns Creek, Pennsylvania
Posts: 6,441
Thanks: 2
Thanked 82 Times in 78 Posts
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Re: Emissions fail, NOx - 1226
Any codes? If not try cleaning the egr valve. You may end up replacing it as it may be bad and causing the problem.
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04-28-2006, 08:28 PM
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#3 | |
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AF Newbie
Join Date: Jun 2004
Location: Pemberton, New Jersey
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Re: Emissions fail, NOx - 1226
Only code that shows up is 41 for the cam sensor; I'll be working on that next week. The valve is a digital EGR valve; any particular cleaning method or should I just spray it with carburettor cleaner or Simple Green?
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04-29-2006, 09:32 AM
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#4 | |
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Pontiac Guy
Join Date: May 2004
Location: Penns Creek, Pennsylvania
Posts: 6,441
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Thanked 82 Times in 78 Posts
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Re: Emissions fail, NOx - 1226
Remove it and spray it with throttle body cleaner. Also check the passageways to the maniford. They can carbon up and stop flow to the egr.
Make sure to allow it to dry before reinstalling. |
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04-29-2006, 10:43 AM
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#5 | |
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AF Newbie
Join Date: Jun 2004
Location: Pemberton, New Jersey
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Re: Emissions fail, NOx - 1226
Will do; thanks.
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