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RE: [T3] Low Voltage

So that means it isn't a matter of the cold start alone, but most likely the
time the injector is on. Now you guys have done it. Prior to becoming
disabled I was an Engineering Technician with Electronics and Optics as my
discipline. This will now bother me until I get a schematic and figure out
how it works. Anybody know if one is available anywhere? From physically
looking at the electronics I would say there is probably a differential
circuit that cuts on/off based on the difference in voltage at some point in
the circuit. If the upper extreme is lower than the design calls for the
transistors used to switch the voltage on/off across the coil in the
injectors may not be shutting off all the way allowing some small leakage
current to remain across the coil causing the injectors to remain on longer
than the spark remains in the chamber. Any other thoughts?

Mark-69 fastback F.I.

-----Original Message-----
From: Jim Adney [mailto:jadney@vwtype3.org] 
Sent: Thursday, June 16, 2005 12:14 AM
To: type3@vwtype3.org
Subject: Re: [T3] Low Voltage

On 15 Jun 2005 at 11:55, Iturzaeta , Joseph wrote:

> I was just wondering how low voltage makes the F.I. run rich.

I wish I knew the specifics, but I believe it started out as a "feature"
would inject extra gas while the starter was cranking. This was something
a choke. Keep in mind that when the D-Jet system was first designed there
no cold start valve.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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