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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" which would inject extra gas while the starter was cranking. This was something like a choke. Keep in mind that when the D-Jet system was first designed there was no cold start valve. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~