DPR current/O2 sensor voltage

[amalventano at sc.rr.com (Allyn)]

Cathy,

get o2 sensor from www.oxygensensors.com (cheap).
they have a crimp-in connector type that uses the factory harness (even 
cheaper).

the wifes jetta (motronic) had the same sensor (3 wire) as any 16v cis-e car 
i've ever seen.

p.s. you're reading o2 sensor voltage from the green wire to battery ground, 
right?

p.p.s. connecting an AA battery to the green wire (using ground for -), 
should have an impact on DPR current (it should swing the other way).

hth
Al

----- Original Message ----- 
From: "C Boyko" <roccit_53@scirocco.cs.uoguelph.ca>
To: "Allyn" <amalventano@sc.rr.com>
Cc: "C Boyko" <roccit_53@scirocco.cs.uoguelph.ca>; "scirocco list" 
<scirocco-l@scirocco.org>
Sent: Tuesday, September 21, 2004 7:35 AM
Subject: Re: DPR current/O2 sensor voltage


> If the O2 was failing, but not totally dead, it would push the DPR current
> up though, right? When I unplug the DPR, it changes the sound of the
> engine, but unplugging the O sensor makes no difference at all. It should
> though, right? But if it's sending negligible voltage, there would be
> little to no difference?
>
> Oh, one more question. The 16V Passat O2 sensor is 030 906 265K, for the
> 2L GTI (the headache's engine donor) and the stock 16V Rocc, they are both
> 034 906 265 (F or C). SO do you suppose it's just a wire length
> difference? (The fact that the number is the same would indicate the
> Motronic and CIS-E versions are the same???) I haven't gone out to look at
> the potential donor to see where the sensor is.
> Anyone done junkyard O2 sensorectomy from a Passat?
>
> Anyway, I have some reading to do at work today, see if I can sort it out.
>
> Cathy, rich beyond words...
>
>
>> the o2 reading and the DPR reading dont make sense. if the o2 was running
>> that lean, the DPR should be pegging high (about 20mA, not fluctuating) 
>> in
>> an attempt to compensate. you can try to nudge it down to the 5-10mA
>> range.
>> if it hangs out between 5-10mA with minor fluctuation, chances are your 
>> o2
>> is working just fine. if it was actually bad, the feedback loop would be
>> broken, and you would likely have no fluctuation of the DPR current.
>> Al
>>
>>
>> ----- Original Message -----
>> From: "C Boyko" <roccit_53@scirocco.cs.uoguelph.ca>
>> To: "Allyn" <amalventano@sc.rr.com>
>> Cc: "scirocco list" <scirocco-l@scirocco.org>
>> Sent: Monday, September 20, 2004 9:15 PM
>> Subject: Re: DPR current/O2 sensor voltage
>>
>>
>> Okay, a revision, gotta love the whole "fleet" syndrome. Testing the
>> Beetle's battery prior to a trickle charge revealed it to be at 17.4V, 
>> and
>> it wouldn't start, so a multimeter "tech procedure" was in order. A trip
>> to town, and new battery/fuse for the meter reveals that the DPR is 
>> REALLY
>> at 9.9-11.2 mA. And the O2 is between .32 and .03V. Mostly around .04 or
>> so, with occasional blips to tenths of a volt.
>>
>> SO>>>the O2's indicating lean, or that it's dying/ dead, and the DPRs
>> indicating rich, correct? So replace the O2 sensor and tehn check the mix
>> again? Or gently CCW on the mix to get it in the 5-10mA range? What say
>> ye? (I'm going back under her, aren't I? Figured as much)
>>
>> And one more thing, assuming the 16V "Passat convertible" has a decent O2
>> sensor, it's sensor will work, right? (That I can look up)
>>
>> And thanks once again.
>>
>> Cathy
>> 16V Scirocco and some other stuff that won't start....
>>
>>
>>> DPR needs to be fluctuating (within about 5mA), and should average about
>>> 5-10 mA. sitting stuck at .1 and .2mA makes me think its riding out of
>>> range.
>>> as for which way does what -
>>> high DPR is rich (cold start enrichment is ~60mA). however, a low DPR
>>> number
>>> at idle (close to 0mA), means that the mechanical adjustment is too rich
>>> itself (computer is compensating in the lean direction). as far as
>>> adjustment, CW = rich, which causes DPR to go DOWN (cpu adjusts in the
>>> lean
>>> direction, towards 0).
>>>
>>> for your situation, you should go CCW, and it shouldnt take much, since
>>> your
>>> o2 sensor is close to .5 anyhow. ensure there is nothing attached to the
>>> o2
>>> sensor while adjusting the DPR.
>>>
>>> hth
>>> Al
>>>
>>> ----- Original Message -----
>>> From: "C Boyko" <roccit_53@scirocco.cs.uoguelph.ca>
>>> To: <scirocco-l@scirocco.org>
>>> Sent: Monday, September 20, 2004 6:32 PM
>>> Subject: DPR current/O2 sensor voltage
>>>
>>>
>>> Okay, I've looked in the Bentley, and can't find it, and figured someone
>>> could give me a quick answer.
>>>
>>> I'm wanting to adjust my mix on the 16V, and finally got a harness
>>> hooked
>>> up to measure DPR current, right now it's fluctuating between .1 and .2
>>> mA
>>> and I seem to remember the goal being just rich of .5 if I could
>>> remember
>>> whether higher is richer or leaner. I know it's "righty richy" on the
>>> Allen key.
>>>
>>> So question one is does low = rich or lean, and what's the target value?
>>>
>>> Anyway, I'll check the O2 input first, it should be 5ish too, on
>>> whatever
>>> voltage scale, right? (0 being dead and 10 being full rich?) I have it
>>> written somewhere, but it's been two years since I last checked it.
>>> Sorry
>>> to be so non-technical here, but the car feels like it wieghs 4000 lbs
>>> at
>>> the moment, I'd like to reduce the dog factor. It's gotta be near where
>>> it
>>> can't adjust out of it.
>>>
>>> That makes question two "what is ideal value for the O2 signal?"
>>>
>>>
>>> Thanks.
>>>
>>>
>>> Cathy
>>> 1987 2L 16V Scirocco - the Silver Headache
>>> 1979 1.8L 10:1 8V - Klaus- sounds like 0.33 of a Chevelle
>>> "The light at the end of the tunnel is probably an oncoming train"
>>>
>>> _______________________________________________
>>> Scirocco-l mailing list
>>> Scirocco-l@scirocco.org
>>> http://neubayern.net/mailman/listinfo/scirocco-l
>>>
>>>
>>
>>
>> Cathy
>> 1987 2L 16V Scirocco - the Silver Headache
>> 1979 1.8L 10:1 8V - Klaus- sounds like 0.33 of a Chevelle
>> "The light at the end of the tunnel is probably an oncoming train"
>>
>> _______________________________________________
>> Scirocco-l mailing list
>> Scirocco-l@scirocco.org
>> http://neubayern.net/mailman/listinfo/scirocco-l
>>
>>
>
>
> Cathy
> 1987 2L 16V Scirocco - the Silver Headache
> 1979 1.8L 10:1 8V - Klaus- sounds like 0.33 of a Chevelle
> "The light at the end of the tunnel is probably an oncoming train"