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2011 disco 4
Member Since: 15 Jan 2021
Location: ashton in makerfeild
Posts: 3
  
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| Land rover discovery 4 restricted performance |
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Hi I'm looking for some advice with my disco 4 it keeps going into restricted performance every time I drive it and comes up with codes something like manifold absolute correlation and cylinder 3 glow plug voltage low. I was hoping its something cheaper then getting the glow plug changed if anybody has any ideas or if i just have to bite the bullet and get them changed. TIA
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 15th Jan 2021 5:17 pm |
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carpyian
Member Since: 03 Apr 2014
Location: buckinghamshire
Posts: 32
 
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Do a search lots of info about this issue.. cracked inlet manifolds
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| 15th Jan 2021 6:10 pm |
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BadgerWazzala
Member Since: 12 Dec 2020
Location: UK
Posts: 32
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I have the same issue but only when accelerating slowly after initial start-up, not if driving away with enthusiasm.
I replaced both MAF sensors and this didn't cure the fault.
I've used a home made smoker to test the manifolds and they seem to be tight, and I've removed and cleaned the throttle body, associated pipework and sensors but to no avail.
My 'restricted performance' resets itself without the use of a scanner (just let the car stand for a while and then restart) so I'm assuming it's a mechanical fault.
Maybe you could try what I have to see if that eliminates your fault before you buy six glow plugs? Also doesn't it need to be sub-zero for the glowplugs to be needed?
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| 20th Jan 2021 2:05 pm |
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2011 disco 4
Member Since: 15 Jan 2021
Location: ashton in makerfeild
Posts: 3
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FIX! I replaced the O ring in the throttle body and made sure the clip was seated right and now runs perfect. The box to the front for the throttle body was leaking air and a little bit of oil and was coming off the throttle body slightly when under load once I got it seated right and the clip in fully it now runs fine
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| 20th Jan 2021 2:23 pm |
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BadgerWazzala
Member Since: 12 Dec 2020
Location: UK
Posts: 32
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You jammy  😀
Wish mine was as straight forward.
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| 20th Jan 2021 2:58 pm |
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2011 disco 4
Member Since: 15 Jan 2021
Location: ashton in makerfeild
Posts: 3
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I would make sure the box infront is seated right with the clip because mine really looked and felt like it was on properly but I had to push the bottom of the clip in with a screw driver and it like clipped on abit deeper and its been fine since I might have just got very lucky though 
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| 20th Jan 2021 4:11 pm |
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UffBrock
Member Since: 18 Mar 2011
Location: Oxfordshire
Posts: 157
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And possibly reinforce the join with zip ties - I speak from experiece!
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| 20th Jan 2021 7:46 pm |
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Alihan
Member Since: 19 Mar 2021
Location: UK
Posts: 13
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| Re: Land rover discovery 4 restricted performance |
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2011 disco 4 wrote:Hi I'm looking for some advice with my disco 4 it keeps going into restricted performance every time I drive it and comes up with codes something like manifold absolute correlation and cylinder 3 glow plug voltage low. I was hoping its something cheaper then getting the glow plug changed if anybody has any ideas or if i just have to bite the bullet and get them changed. TIA
I have been having the same problem for a long time and have asked in many garages. They all said something different but in general they always said turbo error. Later, the source of the error was determined with the diagnostic connection in the authorized service.
The source of the problem ; Turbo Shut Off Valve
After replacing this problematic part, there was no problem and I did not get the same error again.
2010 Model Land Rover Discovery 4 3.0 SDV6 HSE Luxury
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| 20th Mar 2021 4:19 pm |
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Timmins_c
Member Since: 08 Sep 2020
Location: Liverpool
Posts: 85
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2011 disco 4 wrote:FIX! I replaced the O ring in the throttle body and made sure the clip was seated right and now runs perfect. The box to the front for the throttle body was leaking air and a little bit of oil and was coming off the throttle body slightly when under load once I got it seated right and the clip in fully it now runs fine
Hey, do you have any pictures of the throttle body location and clip your talking about here. I get the restricted performance when i put it under a heavy load. doesn't always happen though.
I have done the turbo drain mod
changed MAF sensors
Cleaned map sensor
made sure the turbo actuator is free
checked for cracked inlets and oil spill on the bonnet sound proofing.
Cheers
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| 31st Mar 2021 7:13 am |
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Hobgoblin
Member Since: 15 Nov 2007
Location: As always, in the sh*t, it's only the depth that varies
Posts: 1445
 
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My D4 has a strange issue, I get the restricted performance and red triangle, no noise and no loss of power. It normally happens within about half an hour drive, it is in the dealer now and I've been told it is the turbo air shut off valve. I'm not as good as I once was........but I'm as good once as I ever was.
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| 8th Oct 2021 4:42 pm |
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Lumpdog
Member Since: 06 Sep 2024
Location: Surrey
Posts: 1
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BadgerWazzala wrote:I have the same issue but only when accelerating slowly after initial start-up, not if driving away with enthusiasm.
I replaced both MAF sensors and this didn't cure the fault.
I've used a home made smoker to test the manifolds and they seem to be tight, and I've removed and cleaned the throttle body, associated pipework and sensors but to no avail.
My 'restricted performance' resets itself without the use of a scanner (just let the car stand for a while and then restart) so I'm assuming it's a mechanical fault.
Maybe you could try what I have to see if that
eliminates your fault before you buy six glow plugs? Also doesn't it need to be sub-zero for the glowplugs to be needed?
Did you sort this issue?? Have the same with mine, if you boot it away from your first pull off it's fine. If you drive slower/softer at about 2000rpm it restricts saying low boost pressure
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| 6th Sep 2024 7:58 pm |
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