DPR current/O2 sensor voltage

[roccit_53 at scirocco.cs.uoguelph.ca (C Boyko)]

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"