timing belt skipped Re: How was your trip home?

[SJ]

From: "Huw Powell" <audi at humanspeakers.com>
To: "SJ" <syljay at optonline.net>
Cc: "Denis" <sparkplugvw at hotmail.com>; <quattro at audifans.com>
Sent: Thursday, December 23, 2004 11:09 PM
Subject: Re: timing belt skipped Re: How was your trip home?


> Actually on the NF/NG with CIS-E3, the ECU has no idea where TDC is, it
> just control the timing electronically *relative* to where the static
> position of the dist. is.  On the turbo cars from that era, there is a
> flywheel position sensor to let the ECU know where TDC is.
**** I think the ECU just cranks up the timing till it detects pinging, then
it backs off a bit.
As long as you are within that "window of opportunity" with aligning the
various marks, the computer will be able to dial in the correct timing based
on the ping reports.
Maybe the ECU constructs a memory map of where the timing should be for
various RPMs and load conditions.
Or am I dreaming this up?

>
> > Actually, the distributor has a rivet in the holding clamp that prevents
you
> > from getting a wrench on the nut. You need to grind off the rivet first
if
> > you want to release the distributor.
> Correct, of course - meaning that if the rivet is still in place, his
> dist. timing should be correct already.
> -- 
> Huw Powell

SJ