Dan n Friends Help me trouble shoot my DPR trouble shoot tool.

[sharpshooter33 at roadrunner.com (David Brown)]

Hmm I cheated on the wires. I didn't use the DMM one's I used 16ga and 
bought the bananna clip connectors from Ratshack... I can buy a whole DMM at 
Harbor Freight for $4 so I really didn't want to waste the wires.  They cost 
over that at Ratshack for just the wires... 8-)
So I bought the bananna plugs for $2.50 and used my own wire.

Interesting that it runs on Amps or MilliAmp's.  This should be fun to check 
out.  So I should set it around 10 mA +/- 1 mA???

Also if I'm using the O2 when it's being adjusted I should also probably 
make sure I have a good O2 and not an old one that needs to be replaced(like 
I have now) to get good readings?

What happens if I unplug the O2 when I'm running?  I remember adjusting my 
old rocco many years ago when we still had Echeck in the state. We unplugged 
the O2 and adjusted the settings by ear to pass the Echeck. 8-)

Thanks
David
----- Original Message ----- 
From: "C Boyko" <roccit_53@scirocco.cs.uoguelph.ca>
To: " Dan Bubb " <jdbubb@verizon.net>
Cc: <scirocco-l@scirocco.org>
Sent: Tuesday, March 13, 2007 7:48 AM
Subject: Re: Dan n Friends Help me trouble shoot my DPR trouble shoot tool.


> As he said, it's mA, so it's a tiny current that you are measuring, so if
> any of the connections in your harness are shaky, this can lead to 
> problems
> too, and this is a pretty easy thing to have happen with small guage wires
> like what you may be using, especially the ones on the leads to the
> multimeter. If they're like the ones I used, they looked like thick wire,
> until you stripped them and the insulation was actually the thick part,
> with about five strands of thin copper inside. And one of the wires in the
> harness should run "straight through", as Dan said, being sure to maintain
> polarity. On that side you're just essentially making the connector a bit
> longer with the wire, while the other side runs through the meter (current
> is measured in series). Oh, and get that car good and hot, it relies on O2
> sensor feedback, which is best with a hot exhaust stream, and also note
> that any changes should be done gradually, with several drives in between
> to make sure the setting "stuck" where you put it. Even at idle, it'll 
> take
> a while for the sensor to pick up and relay  the changes in the exhaust
> gas, so give it a few blips to clear the pipes.
> GL, Cathy
>
> On 7:14 am 03/13/07 "Dan Bubb" <jdbubb@verizon.net> wrote:
>> Well, first off you should be measuring current through the circuit
>> and setting it for 10 +/- 1 ma. Also it's important that you maintain
>> polarity with the maintenance harness in place. If you should reverse
>> the wires then the engine won't run well if at all. It may be simply
>> that if you're measuring voltage the high impedance of the voltmeter is
>> enough to impede the correct current flow through the DPR. Dan
>>
>> From: "David Brown" <sharpshooter33@roadrunner.com>
>> To: "scirocco scirocco" <scirocco-l@scirocco.org>
>> Sent: Monday, March 12, 2007 11:07 PM
>> Subject: Dan n Friends Help me trouble shoot my DPR trouble shoot
>> tool.
>>
>>
>> Ok I assembled the DPR/Multi meter tool pretty sure I got them wired
>> right.
>>
>> Plugged it in and it starts, but then won't maintain idle. The
>> multimeter shows around 7.9v it doesn't change it just drops off even
>> if you try to hit the pedal. the voltage remains around 7.9v until I
>> turn the key off.
>>
>> Whatz up with that?
>>
>> BTW thanks for the link for the connectors Dan. 8-)
>>
>> David
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>>
>>
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