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Old 04-07-2019, 10:26 AM   #1
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New style VSS sensor in MTX75

Hey there, I did a transmission swap, from a IB5 to a MTX75 and now I'm facing speedometer issues.
The old style sensor was mechanical snail-wheel type, the new one is magnetic. The speed is about three times too high now.

In SCT Advantage I adjusted System Switches --> Scalars --> Number of holes for OSS Sensor.
Stock value was 8.84, I set it to 26.52 (mutiplied by 3). Speedometer started to read correctly.
But now everytime I flatout the speedometer goes off and odometer goes "-----". (see vid below)
It comes back if I cycle ignition.

Am I missing something?

[YOUTUBE]
[/YOUTUBE]

old


new



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Last edited by Fernando_221; 04-07-2019 at 03:56 PM.
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Old 04-09-2019, 06:21 PM   #2
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Maybe the software map doesn't read that high, no need to with the way it was before.

Computer may well go to infinity, the software though has limits.

Ask Tom, He could likely fix that.
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Old 04-09-2019, 06:38 PM   #3
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Originally Posted by amc49 View Post
Maybe the software map doesn't read that high, no need to with the way it was before.

Computer may well go to infinity, the software though has limits.

Ask Tom, He could likely fix that.
That's what I thought.

Maybe I will need a speedometer signal interface to adjust the signal before it reaches the ecu.
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Old 05-06-2019, 11:50 AM   #4
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I think the issue was the speed sensor

Got a new one and it's working fine for the last 200 miles.
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Old 05-06-2019, 09:31 PM   #5
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Great to hear.....
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