ok DPR tool works for AMPS. What are these readings???

[lord_verminaard at yahoo.com (Brendan Doyle)]

If you make it to Cincy have the gurus take a peek at it.  Mine was all out of whack and Timbo's trusty DPR setup confirmed that.  They had a hard time getting it to settle, it was all over the place.  Finally, one of the guys (cant remember names!) just did it by ear, and when we checked again with the DPR it was pretty close.  All I know is that it ran about 3x better on the way home than it did on the way there.  :)

Brendan
84 Scirocco 8v <-- TDI in progress
01 Jeep TJ 4.0

----- Original Message ----
From: C Boyko <roccit_53@scirocco.cs.uoguelph.ca>
To:  David Brown  <sharpshooter33@roadrunner.com>
Cc: scirocco-l@scirocco.org
Sent: Friday, March 23, 2007 6:23:03 AM
Subject: Re: ok DPR tool works for AMPS. What are these readings???

Bouncing is good (means the O2 sensor is alive), and a hot exhaust stream
is what you want to tune with. The reference I've always used says that
bouncing centred around 5-10 mA is the normal reading. And I tune to a
centre point of 5.5 mA, which is rich. Recall also that DPR is an
adjustment based on what the narrow band oxygen sensor sends to it. NBands
are good at readings right near perfect, but over-rich and over lean mixes
thow their voltage output off sharply (which you'd expect to result in a
DPR reading pegged at either 10 or 0). And DPR reading takes a while to
"settle", as you have noticed. I always look at it that you've made a
change, now you're waiting for that change to hit the exaust stream and for
the sensor to react and send that info back. Takes a few blips of the
throttle to clear out the exhaust, and a bit more time for the readout to
react. And I always take it for a good run after and check again. Not that
I'm any expert! I'll dive in first, and let the real experts nip my head
off :)

Cathy


On 9:18 am 03/22/07 "David Brown" <sharpshooter33@roadrunner.com> wrote:
> Ok Dan, Cathy n gang,
> I turned it over to mA and tada!!!! I get a running car giving me
> signals.  Now what are they. 8-)  At first when it was warming up it
> went to 0.00 Then after it got warm it started running around 5 and
> eventually up around 9.  However it bounced around all over the place. 
> When I say 5 it actually bounced from 2-11, but it seemed 4,5 was the
> average number that came up more.  Then when it warmed up I got 2-15
> with 8, 9 being and average number up.
>
> Is that normal?  I'm assuming it is sending the bouncing numbers
> because the O2 sensor is trying to adjust mixture?
>
> Anyway the tool works! Thanks guys. Now I just gotta figure out how
> to use it properly.
>
> David
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