[tech] ignition probs--update

[abatzis2@hotmail.com (Michael Abatzis)]

after tracing the wiring and looking over the diagrams, the culprit was...a 
blown fuse to the knock box. PO had wired the stereo into that fuse. argh! i 
wonder why i got *any* voltage to the hall sender though?
thanks for the help erik
-michael


>From: "Erik La Celle" <lacelle@frontiernet.net>

>Mike,
>If you were in the main wiring diagram, this is probably not the right
>info for your car if you have a knock sensor (check it out -- no knock
>sensor anywhere in that diagram!).  There is a separate "Electronic
>engine controls -- 16-valve engine" later on in the current flow
>diagrams that does include the knock sensor system in it.  BTW, it shows
>the hall sender _is_ connected to the knock box, not the ignition
>control unit, just like you said.
>
>Will 3-4 volts do it?  I don't think so.  Check the power at the knock
>box, in and out, and you'll have your answer.
>
>Hope this helps,
>Erik L
>----- Original Message -----
>From: Michael Abatzis <abatzis2@hotmail.com>
>To: <scirocco-l@scirocco.org>
>Sent: Wednesday, May 01, 2002 7:55 PM
>Subject: [tech] ignition probs--please help!
>
>
> > i know most of you won't know this off the top of your head, but any
>help
> > would be truly appreciated.
> >
> > the short version: where does the hall sender (16v, same as 8v?) get
>it's
> > power (terminal 3) from? current diagram in bentley (near as i can
>read it)
> > says the ignition control unit. i don't see it. you can stop reading
> > here--this is mainly what i'm looking for. if you're feeling generous,
>and
> > want to read more:
> >
> > long version:
> > driving pretty hard in the new rocco. when i start up from a light, it
>bucks
> > and dies. quick check shows no spark.  tested everything in bentley
>(except
> > knock sensor). nothing from hall sender when cranking. power to hall
>sender
> > was 3-4 volts (bentley says it should be 12). is this enough to cause
>there
> > to be no spark? for kicks, replaced distributor and knock box. timing
>belt
> > intact.
> >
> > any ideas?
> >
> > my understanding of ignition system (don't need to read this to answer
>the
> > question):
> >
> > power goes to hall sender-->distributor turns, hall sender sends out
>timed
> > voltage signal to knock box-->knock box modifies timing based on input
>from
> > knock sensor-->modified timing signal sent to icu-->icu acts kind of
>like a
> > relay, and switches power to coil-->power to distributor cap-->power
>to plug
> > wires
> >
> > thanks,
> > -michael
> >
> >
> >
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