When you get NOx as products from combustion, it is usually from higher than
normal combustion temperatures. Try a higher octane fuel and a cooler
thermostat.
----- Original Message -----
From: "Yuri Klepach" <civicr1992@yahoo.com>
To: <autox@autox.team.net>
Sent: Monday, December 17, 2001 2:29 PM
Subject: Failed NOx emissions. HELP!!!!
> Hi guys!
>
> My 1992 Civic just failed NOx emissions (1990 vs 1370 allowable). CO & HC
were around 30-40% of the limit. The engine is B18B1 from 94 Acura Integra
(non-VTEC). No internal mods. External mods are: Cold Air Intake, 4-1 DC
header, cat (installed last spring) & 2.50" SS tubing. The engine has
around 100K but is very clean inside (shiny) & it doesn't burn any oil
(always Mobil 1). I have a brand new O2 sensor (2 months old) & spark plugs
were replaced last summer w/NGK. One detail: my cat sits about 10-12" away
from the header. Would mounting the car right next to the header help?
>
> Now, can you suggest what to do to reduce NOx? Clean throttle body? How
about removing the crank ventilation hose from the intake tube? Replace the
spark plugs w/brand new ones? Will retarding of timing help to reduce NOx
(heard that version)?
>
> Please suggest me what would help, I only have 45 days to fix everything
(damn Jersey).
>
> Sorry that the post isn't very AutoX related (I did AutoX though).
>
> Thank you for any info/suggestions.
>
> Yuri Klepach
>
> /// autox@autox.team.net mailing list
> ///
> /// To unsubscribe send a plain text message to majordomo@autox.team.net
> /// with nothing in it but
> ///
> /// unsubscribe autox
> ///
> /// or try http://www.team.net/cgi-bin/majorcool
> ///
/// autox@autox.team.net mailing list
///
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe autox
///
/// or try http://www.team.net/cgi-bin/majorcool
///
|