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Home > Maintenance & Modifications > Intermittent fault, throttle not responding, revs stay at id |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
I've done two atf fluid changes at 105k and 130k but no software update. Haldex also feels like it needs a service so not sure if that's an issue? The hesitation seems to coincidence with the noise the haldex makes when pulling away, three or four short bursts of a sort of scuffing noise. |
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25th Jul 2024 3:32 pm |
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Boxa Member Since: 01 Apr 2024 Location: Coventry Posts: 97 |
you could take the prop of and see if it makes any difference, trouble is noises can confuse you and throw red herrings sometimes. |
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25th Jul 2024 6:42 pm |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
Tempted to pull the haldex fuse and see if that works |
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25th Jul 2024 6:45 pm |
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Boxa Member Since: 01 Apr 2024 Location: Coventry Posts: 97 |
oops I meant to say that as well give it a try |
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25th Jul 2024 6:47 pm |
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sid Member Since: 16 Jul 2015 Location: devon Posts: 490 |
has this fault not been mentioned before?With the cure being a software problem. |
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25th Jul 2024 9:39 pm |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
Autobox software?
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25th Jul 2024 9:47 pm |
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Openroad515 Member Since: 25 Jul 2024 Location: North Yorkshire Posts: 4 |
Hi all....
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26th Jul 2024 9:28 am |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
That's exactly the symptoms I have but it only lasts 5 to 10 secs then returns to normal. Neen happening once or twice a day, then I changed the crank sensor and it's gone to chugging almost stalling rather than no throttle response at all. |
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26th Jul 2024 9:53 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1367 |
Are you sure it’s not one of the sensors on the throttle pedal? Fly by wire controls that are fitted don’t have a physical connection between pedal and fuel pump, just an electrical circuit controlled by computer chips, with inputs and feedback loops. Your foot might have commanded increased engine speed but do you know that the signal got to the fuel system? |
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26th Jul 2024 10:28 am |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
No idea, can the pedal unit be checked? New unit from LR is about 260 ish, so a bit pricey just to try it. Could always get one from a breakers I suppose |
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26th Jul 2024 10:45 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1367 |
You’d need an OBD device see outputs from the throttle sensors and compare demanded and actual fuel rail pressure to compare what was asked for and what was given. |
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26th Jul 2024 11:24 am |
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AndyPP Member Since: 20 Jun 2017 Location: South Yorkshire Posts: 99 |
I've got a cheap obd dingle and car scanner pro app but not a proper code reader. I'm assuming it will only show a problem when the fault occurs, so not easy to diagnose when the fault isn't occurring.
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26th Jul 2024 11:26 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1367 |
CarScanner can do data logging, you just have to connect up your phone and remember to disconnect again at the end of the journey. Not certain it will log demanded verses actual throttle positions or fuel rail pressures but it does give instantaneous readings as graphs. |
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26th Jul 2024 11:35 am |
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IanMetro Member Since: 11 Sep 2017 Location: Somerset BS21 Posts: 3107 |
I can't find the posts, but I am sure that I have read, either on this site or Landyzone, about problems with worn Accelerator Pedal 'Sender?' units. That would give you your symptoms. Also have you seen this posts with similar? symptoms. https://www.freel2.com/forum/topic39328.html It looks as if it was cured with a new MAF sensor. FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011) FL2 Metropolis SD4 Auto 2014 2017- (16k - 77k+ miles) (MY2015) Metro in its 11th Year of (Extended) LR Warranty / Full LR Service History (Expensive, but Trouble/Worry free - hopefully?) |
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26th Jul 2024 1:25 pm |
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