Definitely think about changing the forward O2 sensor(s). They can cause
this problem.
- Bernd
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Eric Huff
Sent: Thursday, August 19, 2004 9:32 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: RE: smog info
Not sure how many miles... It's definitely not a low mileage truck, though,
that's for sure. I think it's probably around 80-100k.
Thanks for all the info, folks.
eric
> Yes...cat related as well as the miss. Noticed the high CO - how many
> miles are on the vehicle (or more to the point...the O2 sensors)?
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Eric
> Hufstedler
> Sent: Wednesday, August 18, 2004 12:08 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: smog info
>
>
>
> Whoops. I left out the subject on that last one...
>
> A friend failed the california smog test on his 95 dakota 318 auto.
> (high HC and NO at 15 mph, high but passing at 25mph also).
>
> In looking up info on it, i found this site which seems pretty useful
> if you're not very familiar with smog checks:
>
> http://www.smogcheck.ca.gov/StdPage.asp?Body=/Geninfo/OtherInfo/Vehicl
> e_Insp
> ection_Report_Glossary-May_1996.htm#EGR
>
> Here are the actual numbers:
>
> MPH HC CO NO
> 15 92 (88) .33 (.64) 847 (508)
> 25 53 (53) .15 (.78) 491 (761)
>
> #'s in () are max allowed.
>
> His cat does make a lot of noise (which when mine did the same, was
> replaced under warranty). On mine (99 dak), it was some baffle
> inside. I don't know if that affects performance or not.
>
> He's also missing on at least one cylinder, so the HCs will probably
> be ok when he replaces the wires (which he said were in fact bad when
> he checked them, even though they are only 6 months
> old..)
>
> His only dilemma (at the moment) is whether to replace the cat now or
> not.
>
> Can any of you smog experts tell from the emission if the NO is cat
> related, or EGR, etc?
>
> thanks,
> eric
-- 1974 Valiant 4-door, 318 1999 Dakota Ext Cab, 2WD
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