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Erratic speedometer with Dakota SGI-5E

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Old May 24, 2017 | 07:32 AM
  #1  
89firebird's Avatar
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Joined: Jul 2001
Posts: 86
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From: San Antonio, TX
Car: 89 Firebird Formula T-Top
Engine: SP383 FIRST Fuel Injection
Transmission: T56 Tremec Magnum
Axle/Gears: Moser 12 Bolt, 3.42 Eaton Posi
Erratic speedometer with Dakota SGI-5E

After changing the rear end and transmission I needed a way to calibrate my speedometer. The Dakota Speedometer Signal Interface seemed like an easy solution.

When the car is moving, it works fine. I was able to calibrate the speedo pretty easily.

But when I'm at an idle stop, the speedometer needle bounces a bit. Trying to figure out what might be causing this.

Anyone else have experience with this?

Thanks!
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Old May 24, 2017 | 06:37 PM
  #2  
QwkTrip's Avatar
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Joined: Mar 2001
Posts: 10,406
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Erratic speedometer with Dakota SGI-5E

What output are you using and what dip switch settings? The speedometer can work on multiple settings but some provide better performance than others.
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Old Jun 1, 2017 | 10:57 AM
  #3  
eflores's Avatar
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Joined: Nov 2002
Posts: 66
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From: Crawlorado Springs Co
Car: 91 z Clone
Engine: 6.4l LSX
Transmission: T56
Axle/Gears: s12 3.73
Re: Erratic speedometer with Dakota SGI-5E

i hope this helps 89fb

https://www.thirdgen.org/forums/elec...2-l03-t56.html
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