Well, failed again after I flushed the cooling system and replaced the
O2 sensors. THe leveles didn't change much but did get a little
worse.......I'm going backwards here! I was trying to do the easy
stuff first to see if that would fix it. The truck is back to stock
specs not except for an electric fan and a K&N cold air. I have the
CAT to install and going to pull the intake manifold and replace the
seals next. This is getting frustrating but gotta be done I guess.
Any other ideas out there? Besides leaving the keys in it in the Wal
Mart parking lot?
On Sat, Jul 19, 2008 at 5:56 PM, Bernd D. Ratsch <bernd@dodgetrucks.org> wrote:
>
> His HC and CO would be higher and it's not.
>
> - Bernd
>
> -----Original Message-----
> From: Brian [mailto:hskr@cox.net]
> Sent: Saturday, July 19, 2008 3:53 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: RE: Failed Colorado Emissions High NOx A little long....
>
>
> For starters, I'm wondering hy you went to a higher octane fuel to try and
> pass emissions. The higher octane will burn slower resulting in more
> unburnt fuel entering the exhaust. I'd try running a couple tanks of the
> lowest octane you can get through and trying again.
>
> brian cropp
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Mike Guzinski
> Sent: Saturday, July 19, 2008 2:20 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: Failed Colorado Emissions High NOx A little long....
>
>
> Hey all,
> It's been a while since I have done much on the list but now it seems
> I am (or Air Care Colorado is) having a problem with my 99 Dakota. I
> have a 5.2 L 4x4 with a K&N FIPK Mopar Performance PCM MSD wires,
> brass cap and roter, Viper electric fan, 180 deg stat. I don't put
> too many miles on this a year, My daily driver is an 06 Magnum R/T.
> Here are my results in the 3 yes 3 tests I failed!
>
> The first test I had the oil changed and cleaned the K&N and put in a
> quart of denatured alcohol in the tank with 4 gallons of gas. I ran
> it up to temp for about 45 minutes.
>
> Reading Limit
> HC GPM 0.6615 1.2 Pass
> CO GPM 8.5833 15.00 Pass
> CO2GPM 520.8941
> NOx GPM 2.7288 2.0 Fail
>
> The second test I installed new factory spec NGK plugs gapped to .045.
> I put in a bottle of B&G 44k then I ran the tank of gas down to about
> half a gallon and refilled it with 10 gallons of premium 91 octain.
>
> HC GPM 0.8090 1.2 Pass
> CO GPM 6.6932 15.0 Pass
> CO2GPM 519.0306
> NOx GMP 2.6831 2.0 Fail
>
> The third time I took out the 180 stat and put in a new 195. I took
> out the Mopar Performance PCM and replaced with the factory PCM.
> Regapped the plugs to .040 which is factory spec. I followed the
> reprogram procedures on the list for the OBDII. I also checked the
> cat, it "appears" to be good and I also checked for vac leaks. I
> looked for the EGR valve...lol....there isn't one.
>
> HC GPM 0.9292 1.2 Pass
> CO GPM 11.3572 15.0 Pass
> CO2GPM 512.0061
> NOx GMP 2.9614 2.0 Fail
>
> I also looked back to see what my truck was at on my older emissions
> test from 2004 and 2006 Here is what I got:
>
> 2004
> HC GPM 0.8641 4.0 Pass
> CO GPM 12.6890 20.0 Pass
> CO2GPM 511.1926
> NOx GMP 2.8967 9.0 Pass
>
> 2006
> HC GPM 1.6168 4.0 Pass
> CO GPM 17.8321 20.0 Pass
> CO2GPM 512.0025
> NOx GMP 4.5176 9.0 Pass
>
> Now they toughened the standards since 2006 and on the new tougher
> standards my truck would have never passed. Now it has 158000 miles
> on it and it's cleaner than it was when it was only 4 years new. I am
> just finding nothing that will change the NOx levels at all. Could it
> be the CAT? Wouldn't the other leveles be high if the cat was bad? I
> have never had any check engine lights and does not show any codes.
> Any suggestions you have would be great.
> Thanks,
> Mike
>
>
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>
>
>
>
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