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kelvin12382003
Member Since: 02 Sep 2011
Location: Hong Kong
Posts: 19
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| Discovery 4 Engine problem (not so powerful as before)? |
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Hi all
I have a discovery 4 here in Hong Kong.
so here is the story begins
I got my D4 3 months ago, it was perfect in every single way, powerful, smooth etc...
Gradually the car has gain more n more KM, so when the car got to around 12000km, it felt like a 1000cc engine. what i can say its powerless.
then I brought to the dealer to get checked, but the dealer said "nothing wrong with it only need to change the engine oil n filter"
so I believed them. but when i picked up the car, it had roughly 70% of power, but still not as good as before.
Therefore, I would like to ask anyone here know what the problem is? how can I make it like new again
please let me know
regards
(sorry for me poor english)
kelvin
updated info
I forgot to mention that everytime when I start the engine, immediately the rev would jump from 800rpm to 1000rpm for a while before it go back down again.
Last edited by kelvin12382003 on 2nd Sep 2011 10:46 pm. Edited 1 time in total
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 2nd Sep 2011 3:53 pm |
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Flack
Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6312
  
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kelvin12382003
Welcome to the site, did the dealers not put there IDS system on the car and check for any fault codes on the system..???.
Flack 
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| 2nd Sep 2011 5:41 pm |
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LiftedDisco
Member Since: 10 Jun 2010
Location: Towcester
Posts: 1002
  
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Hiya
Not sure if this will be much help as the dealer was truly secretive over the issue... some mumbled explanation from the girl on reception about a vacuum pipe leading into the compressor having got trapped / constricted and they had been able to free this up...
Call me cynical but surely air comes out of the compressor.... unless the vacuum pipe is something that actuates it...
Dunno but the symptoms were much as you describe with a gradual loss of power and no warning lights etc of any description, just a 'gut feeling' that all was not well.
Still came back from the dealer with all the vim and vigour I expected.... D4 Commercial - 65 Plate, 2016MY
D5 Commercial - Handed back when I left that job…
D4 Commercial (2014MY) - gone
D4 Commercial SDV6 - Baltic Blue (also gone)
D1 300TDi... 2" lift, HD bumpers (both), detachable tow hitch, 9,500lb winch, 235/85/16 muds and plenty of other toys (gone to make way for the next toy...)
Smiles per Mile - Tornado Motorsports caged Evo 3... 100" Defender look-alike, with Range Rover running gear - all fully IVA'd and registered!
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| 2nd Sep 2011 7:38 pm |
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wiggs
Member Since: 03 Sep 2006
Location: Manchester
Posts: 14372
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Does the car smoke when driving / accelerating ? G4 Gone ...but not forgotten
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| 2nd Sep 2011 7:47 pm |
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kelvin12382003
Member Since: 02 Sep 2011
Location: Hong Kong
Posts: 19
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Flack wrote:kelvin12382003
Welcome to the site, did the dealers not put there IDS system on the car and check for any fault codes on the system..???.
Flack
hi mate
thanks for the reply
the dealer claimed that he did put the system to check if there is fault code , apparently there is none!!
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| 2nd Sep 2011 10:38 pm |
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kelvin12382003
Member Since: 02 Sep 2011
Location: Hong Kong
Posts: 19
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wiggs wrote:Does the car smoke when driving / accelerating ?
No, the car did not smoke when driving!
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| 3rd Sep 2011 4:28 am |
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bundubasha
Member Since: 02 Nov 2010
Location: Nairobi
Posts: 62
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This sounds like what mine is doing. General loss of power, I used low ratio to manoeuvre around a friends sloping drive yesterday... There is a bit of smoke, but only visible on long hill climbs, the kind you probably don't find in Hong Kong... 
What were you thinking Wiggs, turbo failure? __________________
ex - 1972 lightweight
ex - various Disco 1
ex - 2004 Disco 2 TD5
now - 110 challenge vehicle with 3.9 V8 and Unimog portals
Now - 2006 TDV6 Kaymar rear bar, lone ranger tank, various expensive out of warranty repairs...
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| 25th Sep 2011 6:31 am |
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bundubasha
Member Since: 02 Nov 2010
Location: Nairobi
Posts: 62
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Kelvin, is your D4 making any different noises? Mine is making a hissing sound under hard acceleration, not very loud, but you can definitely hear it. __________________
ex - 1972 lightweight
ex - various Disco 1
ex - 2004 Disco 2 TD5
now - 110 challenge vehicle with 3.9 V8 and Unimog portals
Now - 2006 TDV6 Kaymar rear bar, lone ranger tank, various expensive out of warranty repairs...
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| 25th Sep 2011 6:32 am |
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promitheus
Member Since: 04 Jul 2009
Location: Afidnes, Greece
Posts: 572
 
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Kelvin, is it petrol or diesel?
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| 25th Sep 2011 7:48 am |
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kelvin12382003
Member Since: 02 Sep 2011
Location: Hong Kong
Posts: 19
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promitheus wrote:Kelvin, is it petrol or diesel?
Mine is diesel.
I have noticed any difference in terms of noise. Buy the only thing that I noticed the most is the accelerate pedal feels heavier than before.
Still don't know why, or every single d4 has a different bhp?
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| 25th Sep 2011 3:40 pm |
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bobgolden
Member Since: 15 Oct 2010
Location: South Yorkshire
Posts: 907
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Hi Kelvin,
I used to live in HK up to the end of 2007. It's most likely that your DPF has become blocked and the engine is either choked or trying to regenerate the filter. Given the traffic on HK Island (I assume you live there since you can afford a D4), you'll need to go over to NT or the airport and give it a 20 minute blast to clear the DPF. If you can set the cruise at 60 mph for 20 mins or so, the engine manageent system will hold the right revs to burn off the excess soot.
Bob. 2010 MX-5 2.0 Sport Tech PRHT
2019 Suzuki Vitara AllGrip
Gone BMW X5 xDrive 30d M Sport (F15)
Gone Disco 4 HSE SD V6
Gone 2008 Jaguar XF 2.7TD Premium Luxury
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| 25th Sep 2011 4:16 pm |
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