[tech] ignition probs--please help!

[abatzis2@hotmail.com (Michael Abatzis)]

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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