The general reason for excessive CO is too much fuel and/or too little air.
That's an overly rich A/F ratio. Cleaning that K&N should help, especially
if it's been a long time since you've cleaned it. Being in Denver probably
causes you to run rich a lot of the time anyway. Perhaps your MAP sensor
should be checked since it is the guy that senses barometric pressure. You
don't have a lot of leeway up that high.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of Grady
Ogburn
Sent: Tuesday, October 01, 2002 10:09 AM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: DML: Help passing emissions...
Folks-
I just failed emissions miserably, for CO levels. The engine was
fully warmed up when the test was run (Colorado Emissions test, if
that matters).
I've got ten days to remedy the situation, and I plan on the
following:
1. Burn a tank of gas with FI cleaner (Chevron)
2. Clean TB and all sensors
3. Clean & re-oil K&N
4. Burn a little bit of H2O, using the SpeedTweaks "dixie cup" method
Will these actions contribute to a better CO level? At 29k miles
(most at altitude, running ethanol-oxygenated gas), should I replace
the O2 sensor? Any other suggestions?
Thanks
-- Grady Ogburn (Denver, AIM: JGradyO) Black '98 Sport CC 4x4 5.2l, 5 Speed, 3.55 LSD K&N GenII, MP TB, JET II, MSD 6A, Magnecor 8.5 Wires Mesa Headers & Cat, Gibson/MagnaFlow 3" Exhaust Leer Topper
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