[DML] Maybe Catalytic?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[DML] Maybe Catalytic?

Hi Everyone
It's been a while since I've written the group.  I read through some of the
archives (lots of great information there), but I was hoping to get some
experienced minds on this one.
I recently failed my smot test (California), and the results were as
At 15mph
RPM - 1916
CO2 - 14.2
O2 - 0.1
HC - 141max, 45ave, 94meas
CO - 0.99max, 0.16ave, 0.94meas
NO - 1148max, 434ave, 45meas
Result - Pass
At 25mph
RPM - 1903
CO2 - 14.4
O2 - 0.5
HC - 113max, 33ave, 15meas
CO - 0.79max, 0.14ave, 0.00meas <--- this showed normal after a manual test
NO - 978max, 357ave, 1787meas  <<<<< problem - pass is 1100
Result - Fail
The technician went through a series of checks based on the results and he
suggested either the fuel injection or fuel pump not sending enough gas OR
the catalytic converter is no longer effective.  The Nitrogen Oxide readings
were high - everything else seemed fine.  The test results above were from
one run, we got the high NO readings on the second run - truly weird.
Reading through some of the previous threads in the list, I could actually
also blame additional things like:
    1. Gas in the tank is about 6 months old - haven't been driving it much
(this will change :-))
    2. I've been using 91 octane (many of you felt strongly about keeping it
at 87 octane).
Well, before I was thinking of doing a fuel injection flush, or at least run
a cleaner through the system.  Pipe out as much of the old gas as possible
and refill with 87.  Then finally look at the catalytic converter (maybe use
SpecialT's catalytic replacement).  Does this sound right to you guys?  Does
the catalytic converter (41k original miles) sound like the culprit here, as
recommended by the technician?  Thanks.

[Non-text portions of this message have been removed]

To address comments privately to the moderating team, please address:

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:

<*> To unsubscribe from this group, send an email to:

<*> Your use of Yahoo! Groups is subject to:

Home Back to the Home of PROJECT VIXEN

Copyright 2006 ProjectVixen.com.  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive