My 92 Olds Cutlass Ciera 3.1 L V6 fails NOx emission. Other emission test criteria are OK. Got new catalytic converter and muffler on. They did not help. Any suggestion about part repairs or replacement to reduce NOx level? Thank you!
2006-07-29 15:30:36 · 2 answers · asked by Hao T 1 in Cars & Transportation ➔ Car Makes ➔ GMC
Thanks to Archer Christifori for taking time to respond to my question.
Here is some additional detail. A few years back, O2 sensor was replaced to pass other emission test criteria such as, CO, etc. It seems EGR is a deive to control NOx emission for many car models. I searched online, as well as going to AutoZone store to check out if my car model actually has an EGR. The store did not have it, Online websites have not led me to any "correct" part for this model year. So, I am presently under impression that Olds Cutlass Ciera 92, V6 3.1L does not have an EGR! Am I missing something here?
Also, I did try to replace MAF once. That did neither solve the problem !
Further suggestions are definitely welcome! Thanks.
2006-07-30 04:44:30 · update #1
Thanks to Hugg2dz for the ideas. Tried some of those a few years back. Want to find if there is any other effective way.
2006-07-31 14:32:40 · update #2
The EGR system is what reduces NOx emmissions... you may also want to check the O2 sensor as well.
2006-07-29 15:33:16 · answer #1 · answered by Archer Christifori 6 · 0⤊ 0⤋
how about a simply tune-up; belts,spark plugs,oil, and spark plug wires. maybe running too too rich
2006-07-31 15:27:52 · answer #2 · answered by hugg2dz 2 · 0⤊ 0⤋