 | Home > Technical > 130 won’t go above 58mph |
 
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| mwestcrew Member Since: 09 Dec 2019 Location: South Warwickshire Posts: 266   
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Strongly advise not letting anybody "flash" the ECU.
Pumas did have a 85mph limiter in the ECU and this can be disabled via a BAS remap. Have a look in the drivers seat box and see if there is anything non-Land Rover connected, maybe an additional CAN interface. 2011 130 Utility Body 2005 110 Van |
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19th Jul 2022 11:35am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17466 
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I'm very surprised that it has never had a tacho fitted, I presume that it did not have any towing equipment fitted - to tow any trailer legally for the EA it would need a tacho, and that would generally also involve a speed limiter.
Ex-utility Defender tend to have a mass of extra wiring and typically it is easy to miss something. I presume also it never had either a hand throttle or rev-increaser (such as for running a winch or inverter) nor a run-lock system? If either of these are present they could include a speed-limiting function |
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19th Jul 2022 1:20pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612 
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There is a speed limiter in the engine ECU - default factory is 140kph (87mph - probably indicated 90mph or so).
I reckon a 58mph indicated limiter is probably 56mph (90kph). You can see this in the Nanocom emulator: https://emulator.nanocom-diagnostics.com/# Go Defender > Puma, then select 2.2, then Puma Engine > Settings First thing that pops up is.... 
So it's NOT necessary to do an ECU reflash, it's simply an ECU setting.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jul 2022 3:58pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83 
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Hi bear100, I may have to think about a remap or similar, but I will need to try and eliminate everything else first.
Blackwolf , I know what you mean re the tacho, but there is no evidence that there was anything fitted that I can see. It has a big drop link towbar on the rear so must have been towing some heavy stuff, compressors and pumps maybe… Click image to enlarge There is also no evidence of any rev increaser, run lock or hand throttle. 4x4 West couldn’t help and said that they could flash the ECU and put it back to factory settings, but that there was no guarantees. I’m not going down that route at the moment. I had a call back from Roger Young who said that they did not install any telematics or speed limiters and referred me back to the EA who are basically a deep hole of nothingness where nobody assumes any responsibility for anything. Apparently Revus carry out the maintenance and servicing of the fleet, but would not fit anything like telematics etc. They gave me the number of a chap called Trevor Bragg who is the fleet manager there and I have left a message for him, but don’t expect a call back so will try again tomorrow. I’ve had the speakers off on both sides and fuse/relay cover off on the drivers side… Click image to enlarge and cover on the passenger side and there is nothing at all in there. I’ve also taken out the centre of the dash and had a good look in there and there is nothing. The only thing is an Autoleads telemute box… Click image to enlarge which I think is for muting the radio during a call. There was a mobile phone system installed which I’ve removed and the telemute is all that remains of that. There is nothing under the drivers seat… Click image to enlarge apart from the fuses and relays and a fog lamp box of tricks and there’s nothing under the fuses and relays that I can see using my mobile phone camera. There is a split charge relay under the passenger seat which isn’t connected to anything at the moment. And next to it a small yellow relay, but I don’t know what that serves. Click image to enlarge There was what I think is a tracker box or similar on the roof… Click image to enlarge This has got three thick and one thin coaxial cables coming out, but I don’t think it was actually connected. I contacted Conrad Anderson as per Landy Andy’s link - thanks. They said that if they had installed anything, there would be a plug in the loom next to the throttle pedal or if soldered, within 4 inches or so and I can’t see anything. I’m planning to drop the better half in Inverness around the 20th August, and might have to drop in to Pete at BAS and see if he can help should I have no luck before then. Planning to go away on Friday to help out at a summer camp for around 60 kids, so the aim is to mend it before then 
The next stage is to remove the dash for a really good look to see if there is anything behind. Is that a big/tricky job? Thanks for all your help so far chaps. |
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19th Jul 2022 4:22pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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Thanks for that Martin, yep, I’ve been there and it’s set to 140kph. |
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19th Jul 2022 4:25pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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This is a photo in the engine bay…
Click image to enlarge I’m presuming that the item on the right of the main ECU, with the red and yellow wire, is a standard fitment item? I have know idea what it is. |
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19th Jul 2022 4:30pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17466
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Removing the dash is intimidating rather than difficult because there are many fixings, but no particular problems.
Your vehicle certainly is.producing some puzzles! I'm sure Pete can solve the mystery limiter problem, he's nothing short of a magician!  |
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19th Jul 2022 4:33pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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Ok so this is what I’m thinking, If the main ECU has a speed limiter incorporated into it and that is set to 140kph, then assuming that there is no fault with that, any limiter must be either between that and the fuel pump (assuming the fuel pump has its own ECU) or between the throttle pedal and the main ECU. Does that sound logical?
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19th Jul 2022 4:40pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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Thanks Blackwolf, and damn, you’re so right. I should be the puzzle master after all this. I reckon I’m going to have to give Pete a ring on his technical line tomorrow or pay a visit, although it’s a long way from Southampton  |
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19th Jul 2022 4:48pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612
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Unplug the instrument cluster and take it for a drive with it unplugged.
Use a GPS/phone speedo - does it still limit? 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jul 2022 4:49pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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Thanks for that Martin
. I will try it tomorrow and report back. |
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19th Jul 2022 7:21pm |
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| Bradders130 Member Since: 27 Nov 2021 Location: Southampton Posts: 83
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So I’ve just been reading about a topic where Pete from BAS mentions the transducer in the gearbox which sends a signal to the instrument cluster for the Speedo and then forwards it to the main engine ECU via the canbus. If the main engine ECU doesn’t get that signal then it cuts power.
https://forums.lr4x4.com/topic/16645-defen...estrictor/ It makes me wonder if this is my problem. Is this the line that you were thinking about Martin? |
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19th Jul 2022 11:16pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17466
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Your referring to an extremely old post (2007) when the Puma Defender was new and before Pete had mastered its systems and perfected his remaps.
All the speed info on the Puma does come from the transducer on the t-box and one of the reasons I asked about a tacho is that if one is fitted the vehicle harness has to be disconnected from the transducer and wired via the tacho instead. As far as I am aware the only effective way to disable the normal speed limiter and still have a functional speedo is to modify the ECU data by means of a remap. |
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20th Jul 2022 6:43am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612
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My thought was to remove the speed signal from the CAN bus - the cluster sends this out based on the input it receives from the speedo sensor. If it's not available on the CAN bus the ECU can't limit based on it
You could also try driving with the speedo sensor unplugged instead so there is a speed signal but it's zero. 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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20th Jul 2022 8:54am |
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