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drexarchos
Member Since: 19 Jul 2009
Location: Thessaloniki
Posts: 27
  
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| fuel pressure 0,4 and goes to 0 when running |
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2 months with problems for my disco 3 TDV6 euro 4.
I changed the LP fuel pump, the fuel filter and the HP fuel pump and also we cleaned the injectors.
The pressure is 0,4 bar when I turn the key and when the engine is running the pressure goes to 0!!
As I knew the pressure should be at 0,5 bar and be stable as the engine is running.
Any suggestions? The mechanical said that euro 3 engines ( they have different filter and HPFP) has to work with stable fuel pressure 0.5 but mine which is euro 4 not. He said that the LP is only for the start and afterwards only the HPFP does all the job.
What do u think???
( 2 months with HDC system fault, engine system fault, park brake fault, suspension lowered, F transmission fault limited gears available. The battery was a new one just 1 month old but I changed it as the mechanical adviced me to do so but the problems continued to appear)
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 12th Nov 2016 11:41 am |
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Compusmentis
Member Since: 18 Feb 2016
Location: Effingham
Posts: 237
 
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http://www.disco3.co.uk/forum/topic130062....+fuel+pump
Robbie wrote this post which will tell you everything you need to know about the lpfp.
Check the alternator output if you keep needing new batteries  New gearbox & TC, 3 x front wheel bearings, belts changed, new oil pump, new battery, new rear prop, new front prop, new front diff, front arb refurbed, front cv boot kit, egr blank and BAS software patch, full rear suspension / drivelive rebuild, new front arms, LED trailer light fix, split charge.
Never had a 107, 90 or 127, but have had most of the rest!
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| 12th Nov 2016 7:20 pm |
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drexarchos
Member Since: 19 Jul 2009
Location: Thessaloniki
Posts: 27
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I have read Robbie's guide and it's almost clear that the pressure should be stable at 0.5 bar. I can't understand what's going wrong with my disco and works at 0.2bar and I 've already changed the LP, the fuel filter, the HPFP and the battery 
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| 13th Nov 2016 9:15 am |
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Compusmentis
Member Since: 18 Feb 2016
Location: Effingham
Posts: 237
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Blocked pipes...? Perhaps blow compressed air backwards through them? New gearbox & TC, 3 x front wheel bearings, belts changed, new oil pump, new battery, new rear prop, new front prop, new front diff, front arb refurbed, front cv boot kit, egr blank and BAS software patch, full rear suspension / drivelive rebuild, new front arms, LED trailer light fix, split charge.
Never had a 107, 90 or 127, but have had most of the rest!
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| 13th Nov 2016 9:21 am |
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drexarchos
Member Since: 19 Jul 2009
Location: Thessaloniki
Posts: 27
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It could be.. I was thinking of that yesterday night. It's the only thing I didn't change and make a sense.
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| 13th Nov 2016 9:31 am |
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oblackmer
Member Since: 08 Feb 2016
Location: Newbury
Posts: 64
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What was the end result? Did you get it sorted?
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| 1st Mar 2017 7:26 pm |
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yasser
Member Since: 20 Feb 2017
Location: brasilia
Posts: 3
 
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hi!!! i have one disc 3 2.7 and seam problem!....i check fuel pump tank pressure, 5 bar, go out 0.5 ... i start engine stay 0,5,if i press fuel go down to 0.
i put my scanner and give me DTC low fuel pressure inj.2290....i remove tank, i check all sistem inside and out ...all its ok. i see the link from Mr Hobbie. I did all the procedures, my question is: What makes the pressure drop?
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| 6th Apr 2017 2:35 am |
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