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Reload this Page VSS input for 7730 ECM

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Old 02-09-2010, 09:47 AM   #1
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VSS input for 7730 ECM
a short question: at the 1227730 ECM with 8D (running a TPI) I usually have the VSS directly connected to the ECM, and the ECM supplies the output signal for the speedo (basically the ECM has the function of former VSS Buffers)

Now i have a 89 Van with mechanical speedo and a speed-sensor attached to the speedo, which supplies a brown speed output wire to this Van's factory TBI-ECM.

Is there a way to use this signal at the TPI-ECM? it would safe me a lot of time because otherwise I would have to get a new VSS.
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Old 02-09-2010, 10:57 AM   #2
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Re: VSS input for 7730 ECM
They used that computer in different applications with an optical sensor.

Connect that brown wire to C6 on the computer. and disregard the B9&B10
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Old 02-09-2010, 08:52 PM   #3
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Re: VSS input for 7730 ECM
That will work but you must be able to reprogram the chip.
Option word 3 at $8018, bit 6 must be cleared to enable to optical input.
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Old 02-10-2010, 01:33 AM   #4
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Re: VSS input for 7730 ECM
thank you guys, that's great

I'm using Tunercat for programming, can this option be set there too?
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Reload this Page VSS input for 7730 ECM
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