Dwell / Duty Cycle Q.

[camron at worldaccessnet.com (Camron D. Crouse)]

Here's a pic of my Idle Air Bypass Screw: 
<http://scirocco.dyn.dhs.org/vw/list/Camron/_MG_6196.JPG>

Should I be seeing the O-ring just below the head of the screw?

Thanks again everyone!

- Camron from Vancouver, WA USA
   '86.5 Black 16V 2.0L


******************

> Sean Whalen wrote:
>> Yes, yes, and yes.  They're all dependent on each other.  A new
>> o-ring will make a world of difference.  Air can be your enemy.
> 

Camron D. Crouse wrote:
> Thank you, thank you, and thank you!
> 
> And what about the breather hoses - will the values be close enough
> if they are in running position, or, if only the L nipple to the
> intake boot is in the test position? I did get that to fit snug, ya
> just gotta stuff it in there. Really I'd rather do it "right", but if
> it's splitting hairs then no biggie.
> 
> - Camron from Vancouver, WA USA '86.5 Black 16V 2.0L
> 
> 
> ***************
> 
> 
> 
>> On 5/10/07, *Camron D. Crouse * <camron@xxxxxxxxxxxxxxxxxx 
>> <mailto:camron@xxxxxxxxxxxxxxxxxx>> wrote:
>> 
>> Forgot to add:  Checking the duty cycle of the *Idle Stabilizer 
>> Valve*... just to clarify.
>> 
>> New info:  checked with hoses in place, the lowest value I could 
>> obtain (via adjustment of the idle air bypass screw only, leaving
>> the A/F screw in the fuel dist. alone) was 66%, Bentley target is
>> 26-30%. Red probe on grey/white wire, black to ground.  I actually
>> turned the idle air bypass screw quite a few turns, and quite
>> easily with my bare hands... must need a new o-ring there? It is
>> currently at full clockwise.
>> 
>> Do I need to go back and readjust the the A/F screw on the fuel
>> dist, then check duty cycle again? Are these two adjustments 
>> interactive?  And if I adjust the ignition distributor timing, do I
>> start over?
>> 
>> Thanks!
>> 
>> - Camron from Vancouver, WA USA '86.5 Black 16V 2.0L
>> 
>> ********* Camron D. Crouse wrote:
>>> Checking duty cycle values for 2.0 16V Scirocco w/CIS-E +TT fuel 
>>> enrichment module.  DPR current successfully set while at full
>> running
>>> temp, 10mA +/- 1mA with a brand new auto-ranging multimeter.
>>> 
>>> Trying to accurately check duty cycle.  Bentley describes
>> disconnecting
>>> crankcase ventilation hoses, but the illustration seems to
>> depict a
>>> fuel-distributor-on-passenger-side setup, and the hoses don't
>> quite
>>> correspond so I am unclear on which crankcase hoses I actually 
>>> disconnect and at which points (Bentley illustration shows a
>> ventilation
>>> hose with a nippled T in it, but I have no such T).  In addition,
>>> 
>> the L
>>> nipple to the intake boot does not fit snug while in the test
>> position.
>>> 
>>> Do you folk make this check with hoses disconnected or in running
>>> 
>> position?
>>> 
>>> BTW I am going through DEQ tomorrow so that I can bring my
>> registration
>>> up to date.  Tuning for passing E-check, so stock settings
>> wanted...
>>> 
>>> TIA!
>>> 
>>> - Camron from Vancouver, WA USA '86.5 Black 16V 2.0L