Failing NO Emissions test

Reply Subscribe

Thread Tools

Search this Thread

Dec 10, 2009 | 10:08 AM

turk75

Thread Starter

New User

Joined: Dec 2009

Posts: 1

Likes: 0

Failing NO Emissions test

Hi guys i just got back from the OHIO Emissions test with my 1992 Honda Civic. I Passed every single test on there but the N0 part.. the limit is like 1200 - i shot 2500... ;[

I have a new muffler, Cat converter, O2 sensor and the exhaust pipes are about 2 years old... I was reading online that it could be my EGR valve.. but i am not sure.. i'd love any help you guys could offer. Thank you very much

-Brian

Dec 10, 2009 | 10:18 AM

rick_rabies

I'm not Rick!

Joined: Feb 2009

Posts: 6,940

Likes: 4

From: under a prayer shawl

Re: Failing NO Emissions test

egr valves are cheap. replace it anyways.
that sux...
move to open downpipe country (iowa)

Dec 10, 2009 | 11:50 AM

nothing_shocking

Honda-Tech Member

Joined: Dec 2008

Posts: 616

Likes: 0

From: west lafayette, ohio

Re: Failing NO Emissions test

i didn't even know ohio had emissions tests... ha. why do you have to get it done anyway?

Dec 10, 2009 | 03:18 PM

gwl

Honda-Tech Member

Joined: Feb 2006

Posts: 245

Likes: 0

From: SoCal, CA, USA

Re: Failing NO Emissions test

If you have a car with an EGR system, you should check the passage ways for the exhaust ports. They usually get clogged up with carbon. My 97 HX has an EGR system and I had high NO levels due this problem. Click on the link for some info.

http://www.tegger.com/hondafaq/egr-fix/index.html