Date: Sat, 28 May 2011 19:40:01 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Anything like this for 1.9L?
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You're the electronic genious here of course ...and..
re
It just sits in line between the distributor and the ECU.'
The idle stabilzer may have some affect or influence in the ecu via the one
single white wire that joins the igntion system and ECU on a 1.9 Digiget
system ..
as I see it on page 97.55 ...
the idle stabilzer is not 'between dist and ecu' ..
though perhaps you don't mean that literally.
the way I view it is ...
the igntion system tells the ecu that the engine is turning, and what the
rpm is ..via the white wire going to pin 1 of the ecu.
so the ecu knows to trigger injectors ..
The igntion timing is only determined within the dist, hall sensor, and idle
stabizer, and by rotational position of the distributor ..ie. where it's
clamped down.
the Idle stabilizer is between Dist and Ignitor ..
though I could imagine that between the 2 ...ignitor and idle stabizer ,
they could influence the ECU through the one white wire to pin 1 of the
ecu.
And I could imagine that by fiddling with injector pulse, the ecu could
correct idle rpm. It knows what rpm is by information from the igntion
system, and can adjust accordingly.
I think you are probably right ..
I wouldn't quite say the idle stabizer is between dist and ecu quite though.
Perhaps I am being too litteral.
please explain that again.
thnx.
----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, May 28, 2011 6:08 PM
Subject: Re: Anything like this for 1.9L?
> At 06:33 PM 5/28/2011, Rocket J Squirrel wrote:
>>And there are so many unanswered questions. For example -- the little
>>electronic idle stabilizer box on the left side of the engine. I know
>>what it does for a living, but I have no idea how it does it . . . I
>>mean, what is it using for a "clock" to compare the engine rpms to to
>>determine if the engine is slowing down? Three wires in, three wires
>>out. Bypassable. David Beierl -- you're our only hope!
>
> It just sits in line between the distributor and the ECU. Whenever
> the timing pulse drops below the frequency corresponding to the
> correct idle speed it starts sending the output to the ECU earlier
> than it's actually hearing from the distributor, thus in effect
> advancing the timing. The slower the frequency the more the advance
> up to some limit.
>
> Yrs,
> d
