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1999-2004 Saleen Mustang For the SN-95 New Edge platform. Be sure to specify year, model and equipment if asking for help.

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Old 04-02-2021
SWIFT_S281 SWIFT_S281 is offline
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Join Date: Apr 2021
Location: Spotsylvania
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Announcement Speedometer acting really weird! Please help

So I bought a 2000 S281 about two weeks ago, and have absolutely fallen in love with the thing. Everything had been running perfectly until this morning

I started driving out of my neighborhood and was cruising at what I thought was a steady 25mph, until I looked down at the speedometer and it is showing that I'm going 180mph.

I have no clue what is happening, it seems like the speedometer is multiplying 6x what my actual speed is.

I thought maybe the speed sensor that's located in the back of the transmission, but I replaced that and no change.

Someone please help! This car is beautiful and I'm so sad I can't drive it.
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Old 04-04-2021
SWIFT_S281 SWIFT_S281 is offline
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Default

So I figured the issue out.

It ended up being a bad connection to the Dallas mustang speed calibrator that I found after tracing the cable from the speed sensor (oss) from the transmission to the pcm. Whoever installed it used a solderless quick splice snap wire connector to tie into the cigarette outlet. I'm pretty sure I may have spun the cigarette outlet when I was trying to charge my phone, which broke the connection to the speed calibrator.

The car is new to me, and the guy I bought the car from didn't have it for too long, so he didn't know if someone had changed the gear ratio.

Oh well, hope this can help someone out someday.
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Old 04-05-2021
DarkStallion DarkStallion is offline
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Location: RSM, CA
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Default speedometer

Thanks Swift for the post. Very important I think. Let us know how the re-wire goes and if all is well.
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