Date: Mon, 19 Jan 2004 12:32:34 -0800
Reply-To: Zoran Mladen <zmaninco@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Zoran Mladen <zmaninco@YAHOO.COM>
Subject: Re: 85 wbx 1.9 miss at idle
In-Reply-To: <OF45FF5874.99A0A956-ON85256E20.006204FE@LVS.DUPONT.COM>
Content-Type: text/plain; charset=us-ascii
Yup, I hear you. The point of my initial response was
two-fold:
1. You failed to mention the idle adj screw.
2. To indicate you may have other trouble than just
the idle affecting your ability to pass emissions. I
run at 5 BTDC and easily pass both idle and high rev
emissions.
I am not disagreeing with your response in regards to
how the components of the FI system work.
Z
--- Jay L Snyder <Jay.L.Snyder@invista.com> wrote:
>
> Yes, idle speed is initially set by the screw, but
> it is controlled by the
> idle stabilizer. If you turn the idle speed screw
> while the engine is
> running, the stabilizer will try its damnedest to
> maintain 900 rpm. If you
> get too far off, it will start cycling up and down.
> This is why you need
> to set both the idle speed and the timing with the
> stabilizer by-passed.
> (Put your timing light on the crank with and without
> the stabilizer in
> place. You will see the timing jumping around with
> it on-line. Without
> it, the mark stays put.) My point is, with the
> timing advanced to 5BTDC,
> the stabilizer can not as effectively control the
> idle speed. It is
> already advanced 10 degrees from stock. I have seen
> this over and over.
> The idle wanders high and drifts. I was failed at
> my last inspection for
> this reason. (They check idle speed as well as
> tailpipe emissions.) I knew
> my timing was advanced to around 2BTDC. I pulled in
> the parking lot,
> loosened the distributor clamp and turned the
> distributor. The idle
> settled down and I went back through for a re-test.
> Only ten minutes
> later, all passed easily. I checked the timing
> when I got home and it was
> set a about 2 or 3 ATDC.
> The Digijet distributor has a vacuum retard built
> into it for emission
> purposes. The retarded timing (5ATDC) causes it to
> burn hotter and cleaner
> at idle. As soon as the throttle is cracked, the
> retard goes away. Total
> advance is in line with the other engines.
> All of this is in the Bentley.
>
>
> Jay
>
>
>
> This communication is for use by the intended
> recipient and contains
> information that may be privileged, confidential or
> copyrighted under
> applicable law. If you are not the intended
> recipient, you are hereby
> formally notified that any use, copying or
> distribution of this e-mail,
> in whole or in part, is strictly prohibited. Please
> notify the sender
> by return e-mail and delete this e-mail from your
> system. Unless
> explicitly and conspicuously designated as
> "E-Contract Intended",
> this e-mail does not constitute a contract offer, a
> contract amendment,
> or an acceptance of a contract offer. This e-mail
> does not constitute
> a consent to the use of sender's contact information
> for direct marketing
> purposes or for transfers of data to third parties.
>
> Francais Deutsch Italiano Espanol Portugues
> Japanese Chinese Korean
>
>
> http://www.DuPont.com/corp/email_disclaimer.html
>
>
__________________________________
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
http://hotjobs.sweepstakes.yahoo.com/signingbonus
| 
