LOL, Shane, this list is NOT OBD-II compliant...and not CARB
approved.....;-)
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@buffnet.net
[mailto:owner-dakota-truck@buffnet.net]On Behalf Of Shane Moseley
Sent: Friday, April 06, 2001 3:59 PM
To: dakota-truck@buffnet.net
Subject: Re: DML: Re: A/F monitors and the 4.7L mini cats
Ransom T Holbrook wrote:
> It doesn't matter, before or after..
It does indeed matter. Only the front one is used in the mixture control
loop.
The second one is useful only for measuring cat efficiency.
> . ie. Dynojet places a Air/Fuel sensor
> in the tail and gets good readings.
Thats because the one they use is a wide-band model. Those are a whole
different type of sensor. Difference can be well over a thousand dollars
(I've
seen some that are over $3000). Furthermore, when using the garden variety
O2
sensor - it doesn't become "excited" until it reaches over 600 degrees F.
The
closer to the heads - the better when it comes to 1-wire sensors. Ours are
the
heated type which helps some but still have to be located relatively close
to
the heads. The built-in heater is mostly there to cause the system to be
able
to go into closed-loop sooner (and thus reduce emissions sooner).
Cold-Start
emissions control is a large part of the OBDII regulations.
Latr,
Shane
ps - isn't this better than all the "How fast is the fastest that you've
ever
gone" stuff polluting the list lately?
-- '96 IndyRam-HisIndy-MPI/TB/Pulleys/AccelCoil/MPComp/HookerSuperComps/CompTAs '96 IndyRam-HerIndy-numbered(#142)"Track Truck" '74 Triple-Black Dodge Challenger Rallye 360 home-brew EFI R&D vehicle '68 Black Corvette Convertible 427 (For Sale)
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