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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
  
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| HELP! Restricted Performance but no codes! |
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Hopefully the great and good on the forum can help me with my car.
I was driving on the motorway with cruise control when Restricted Performance (RP) red triangle came on and the car started slowing. I pulled onto the hard shoulder and left the engine running. The engine revs fine with no issues. Switched the car off and let it go to sleep. Restarted and the light was out accelerated gingerly on the hard shoulder and rejoined the motorway only for the same thing to happen.
Pulled off at a service station let it go to sleep and restarted it. Drove gingerly again gently building up speed and got to 70mph. As long as i didn't need to put my foot down and accelerate the car was OK, but as soon as I try to accelerate the RP triangle comes on and it slows. When I plug my IID in it shows NO error codes. 
I took it into my local indi and he test drove it and couldn't get it to repeat the RP but also couldn't see any codes. As soon as i drove it home it the RP triangle came on and it slowed down.
The engine revs OK and sounds fine but the car feels 'heavy' when driving. Its all bit odd. I've attached some video (taken by my daughter) that shows the revs rising but the speed staying low. There doesn't appear to her any gear changing when left in auto so I tried to see what would happen with the paddles, which is the video attached.
Anyway, all help appreciated.
D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner 
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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 19th Sep 2020 4:18 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 13022
  
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have you recently re-fuelled ?
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| 19th Sep 2020 5:39 pm |
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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
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A full tank about a week ago. The engine seems fine. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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| 19th Sep 2020 5:49 pm |
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grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6403
 
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Hey Moo it might be long shot but have you tried checking / cleaning mass airflow sensosrs?
Rgsd
Greg
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| 20th Sep 2020 7:11 am |
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dgarside
Member Since: 17 Jan 2010
Location: Holmfirth
Posts: 734
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This may also be a long shot, and no offence meant 😂 but have you changed settings on the IID app (if using BT version) to show all faults? Mine showed no errors when I got restricted performance until updated settings on Fault screen to show pending or something like that. RLD CB Bracket
RLD Spare Wheel Protector
RLD Sump Protector
ProSpeed Compressor Cover
TPMS Retrofit
Range Rover Digital Dash Upgrade
Tesla Style Android Screen Upgrade
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| 20th Sep 2020 7:42 am |
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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
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I haven't checked IID but it is registering some faults regarding the radio, however, my Indi also couldn't pull up any codes.
I'm loath to go to a main dealer, I've lost faith in them based on past experience. I don't believe they are mechanics, more like technicians and part swappers so I could end up with a long bill and no further forward.
I'll clean the MAF and see if that does anything. Its really frustrating because I desperately need the car. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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| 20th Sep 2020 9:46 am |
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grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6403
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Try to see if air intake body connected ot manifold aint loose as well as it would / could cause perfo issues
what radio codes you getting ?
G
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| 20th Sep 2020 9:53 am |
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L319
Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2083
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Am I being thick, but surely if the restrictive performance warning is on, there must be a fault to generate it, and that will be logged somewhere?
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| 20th Sep 2020 10:22 am |
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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
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You'd think so, but nothing on my IID or the Indi's system hence the challenge of finding it. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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| 20th Sep 2020 10:42 am |
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James W
Member Since: 27 Mar 2008
Location: Riyadh, KSA
Posts: 3079
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One thing I would check is all air hoses really well - remove and give a good inspection for delamination inside and also splits that aren't immediately visible. D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - Gone to someone with less sense and more time to enjoy it 
2016 Toyota Hilux Invincible - Liberating experience
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| 20th Sep 2020 11:33 am |
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Oswiperus
D3 Decade
Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1600
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As previously mentioned, when I had RP on the D4, it didn’t show any codes on IID but if you select advanced iirc then a code popped up. In my case it was MAF and RP was permanent so doesn’t appear to be same fault but you may find a code using advanced hopefully. Stu
2016 D4 Landmark current
2022 Defender D300 SE Gone
D4 2014 XS Commercial - Gone
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone
D2 1999 TD5 E white - current
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| 20th Sep 2020 11:34 am |
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SteveNorman
Member Since: 14 Oct 2005
Location: Somerset
Posts: 1146
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Hi Moo,
If it has come up with that message, there is a stored code.
Many aftermarket equipment doesn’t show a ‘pending’ code, one that has faulted, but hasn’t happened often enough to set a ‘hard’ code.
Go into options on iid and select pending codes, and all other options, except one, show all codes (or something like that from memory).
If you are unsure I’ll post tomorrow from work the screenshot of what I have ticked on the options.
Regards
Steve
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| 20th Sep 2020 1:53 pm |
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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
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Thanks to Steve from T&S Norman, the mystery has been solved.
Its a split manifold. The other was replaced last year. The weird thing is that the symptoms were different hence sort of dismissing it.
On another note, I now know how to use my IID properly. 
Thanks for everyones input and thanks Steve for your help and support as always.  D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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| 21st Sep 2020 7:10 pm |
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