Smog Emission test failuer http://forums.nicoclub.com/zerothread?id=421597 Smog Emission test failuer en-us 2009-11-21T13:05:58-08:00 hourly 1 1970-01-01T00:00+00:00 Nissan Forums / Infiniti Forums - NICOclub http://images.zeroforum.com/new/1/pixel.gif http://forums.nicoclub.com FN-QR http://forums.nicoclub.com/zerothread?id=421597;postid=4879042#4879042 i made my EGR not open on purpose lol... i don't have to get tested so i don't let the EGR open and i have no cat PEZi720 2009-06-30T22:58:17-08:00 Re: FN-QR (PEZi720) http://forums.nicoclub.com/zerothread?id=421597;postid=4879010#4879010 if u have hi nox make sure the hoses going to and from your egr valve are not clogged or leaking.next check the bpt valve and be sure it has strong vacuum going in and out of it. then check the hoses going to and from the bpt valve for clogs or leaks.the bpt is located right above the egr and looks like a disk with 2 hoses on top the b esure the hardline from the egr to the exhs manifold isnt clogged or leaking.between each check the nox should be going down if faulty. we chased down a noix probl;em on a hb for 2 yrs after switching the bpt valve 3 times.a mod of the bpt valve took nox from 1300 to under 700 in i hr. cats have an effect but try testing b4 replacing.remeber as nox goes down, co2 often goes up.. its a balance next check the bpt valve and be sure it has strong vacuum going in and out of it. then check the hoses going to and from the bpt valve for clogs or leaks.

the bpt is located right above the egr and looks like a disk with 2 hoses on top
the b esure the hardline from the egr to the exhs manifold isnt clogged or leaking.

between each check the nox should be going down if faulty. we chased down a noix probl;em on a hb for 2 yrs after switching the bpt valve 3 times.

a mod of the bpt valve took nox from 1300 to under 700 in i hr.
cats have an effect but try testing b4 replacing.
remeber as nox goes down, co2 often goes up.. its a balance ]]> dulobast25 2009-06-30T22:43:08-08:00 FN-QR http://forums.nicoclub.com/zerothread?id=421597;postid=4715073#4715073 check to see if your EGR valve is functioning properly... if not then i personally don't really know where to point youall i know is my NOx gases fail by over 500%!!!!good thing i don't have to get tested! all i know is my NOx gases fail by over 500%!!!!

good thing i don't have to get tested! ]]> PEZi720 2009-05-01T14:09:18-08:00 http://forums.nicoclub.com/zerothread?id=421597;postid=4714642#4714642 Did the smog tech note and OBDII codes If so, that might point you in the right direction. NOx emissions though, are generally a result of high combustion temperatures. The EGR valve (or a cam timing equivalent) is typically what helps reduce the NOx emissions. You might post up a copy of the report itself as well. Sometimes, other emissions leves can be higher than it should but still within passing range. Short of multiple smog device failures, seeing the broader range of emissions might help to more easily diagnose the source of the problem. NOx emissions though, are generally a result of high combustion temperatures. The EGR valve (or a cam timing equivalent) is typically what helps reduce the NOx emissions.

You might post up a copy of the report itself as well. Sometimes, other emissions leves can be higher than it should but still within passing range. Short of multiple smog device failures, seeing the broader range of emissions might help to more easily diagnose the source of the problem. ]]> C-Kwik 2009-05-01T11:42:17-08:00 Re: Smog Emission test failuer (joejoe015) http://forums.nicoclub.com/zerothread?id=421597;postid=4714149#4714149 You may try googling about smog tests and see what cause the NO to be off, may just be a tune up or something simple that can cause it. First you have to find out what it means and what causes it. I live in alabama we have no smog tests so NO means nothing to me. RT 2009-05-01T07:36:51-08:00 Smog Emission test failuer http://forums.nicoclub.com/zerothread?id=421597;postid=4713815#4713815 I recently had a smog test done to my 1999 frontier and didn't pass one portion of the test. The portions that i did pass was the 25mph test CO2, O2, HC, CO, NO. I was ok with the 15mph CO2, O2, HC, CO but where it failed was the NO test.Can somone point me in the right direction joejoe015 2009-05-01T01:34:46-08:00