VSS input for 7730 ECM
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Joined: Mar 2005
Posts: 86
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From: Munich, Germany
Car: 91 TPI Caprice
Transmission: TH700R4
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.
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.
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
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
Connect that brown wire to C6 on the computer. and disregard the B9&B10
Joined: Apr 2004
Posts: 3,180
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
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.
Option word 3 at $8018, bit 6 must be cleared to enable to optical input.
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