[tech] ignition probs--please help!

[lacelle@frontiernet.net (Erik La Celle)]

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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