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SORN
by OldSkrote - 31/07/25 02:07 PM
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New
by Rex_tulips - 30/07/25 07:59 PM
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Forums34
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Posts813,508
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Most Online1,046
Aug 24th, 2023
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Joined: May 2012
Posts: 1,639 Likes: 20
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,639 Likes: 20 |
I have the Torque app and on my GDI +4 it does not seem to be able to read speed. It cheats and displays the speed according to the GPS from the phone! The GPS will most likely be more accurate anyway, I use a digital dashtop readout of speed taking data from the OBD2 port and it's around 5 - 8% high Jon, I assume your car is still very much Ford based? I wonder if a Ford dealer could improve your speedo accuracy? There are many parameters that can be adjusted on the Ford ECU’s using the dealer software including the rolling diameter of the tyres and axle ratio. ![[Linked Image]](https://dl.dropboxusercontent.com/s/pq9gs0e0dzdhvjc/ids100.jpg)
Roger
2011 Plus 4
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Joined: Feb 2010
Posts: 1,415
Has a lot to Say!
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Has a lot to Say!
Joined: Feb 2010
Posts: 1,415 |
I have the Torque app and on my GDI +4 it does not seem to be able to read speed. It cheats and displays the speed according to the GPS from the phone! The GPS will most likely be more accurate anyway, I use a digital dashtop readout of speed taking data from the OBD2 port and it's around 5 - 8% high Jon, I assume your car is still very much Ford based? I wonder if a Ford dealer could improve your speedo accuracy? There are many parameters that can be adjusted on the Ford ECU’s using the dealer software including the rolling diameter of the tyres and axle ratio. Only thing is...it’s not a Ford ECU....
Simon @ Sifab.co.uk
Sifabtemporary@gmail.com
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Joined: May 2012
Posts: 1,639 Likes: 20
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,639 Likes: 20 |
Hey Ho...... 
Roger
2011 Plus 4
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Joined: Nov 2015
Posts: 7,914 Likes: 243
Just barreling along Talk Morgan Guru
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Just barreling along Talk Morgan Guru
Joined: Nov 2015
Posts: 7,914 Likes: 243 |
It's the 3.7 Roadster, so the speedo is fed off the ECU / BCU combo for its readings, although I assume packaged as Ford (Mustang), access for tweaking is locked - many have tried, even some of the more innovative dealers and none seem to be able to crack it Hence they can't cure the rev hang either 
Jon M
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Joined: Feb 2016
Posts: 7,948 Likes: 218
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
Posts: 7,948 Likes: 218 |
The Classic parts book for the 2014 onwards +4 shows a VSS sensor on the chassis page, is this the Vehicle speed sensor?. I assume it comes from one of the front wheels as when I had my car on a RR dyno the other week the speedo did not work. The signal must end up in the ECU at some point as the tickover speed does depend on road speed.
I do find the later wiring diagrams hard to read, or is it just me?
Cheers
John Well spotted John and the location on the harness does suggest its connector is at front of car so tying in with your front wheel location assumption (seem to remember DaveW referring to such). Checked cables from it and as far as I can tell they go direct to VDO master gauge connector on dash. Could not find any similarly coded cables going to ECU or BCU suggesting it is a closed circuit to speedo.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Sep 2020
Posts: 68
Just Getting Started
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OP
Just Getting Started
Joined: Sep 2020
Posts: 68 |
Thanks to everyone for all the replies and insight. Just the technical knowledge I was hoping for from the forum, albeit not with the outcome I was hoping for. So I've spotted a better, GPS display (hopefully more easily read than the one I tried already) and ordered that. I'll report back in due course (a few weeks probably) if it works out ok.
Keith
2017 Plus 4, deep blue
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