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Low fuel pressure 3.0 dCi

UserPost

21:54
October 15, 2014


AndrewS

Guest

1
0

After running beautifully for a year or so, the dreaded shudder came back. The car runs fine on a light throttle, even up to motorway speeds, and amazingly up steep hils. But ask it for more, say to overtake, it shudders as if starved of fuel. Lift off throttle and it recovers. The good news is that it is usable so long as i drive like an oldie (which i am), but not being able to overtake is a problem.

My indepenedent garage has diagnosed low fuel pressure viz

Idling: 280 bar which is correct

Light load 700 bar

Under load, 650, then 500, then less than 100; it should go up to 1,000bar; hence the symptom of fuel starvation.

Lift off: returns to 500 bar

The fuel supply line from tank to engine is fine.

The garage says he is stuck and does not know what to do.

So…. a diesel specialist reckoned he fixed this once before by cleaning a contact on the fuel pressure regulator. I am not convinced.

Anyone any ideas? And don't say get rid of it and get a 3.5 Brad.

Also i would like to ask a garage with experience of this engine. Someone had a good result from a Saab garage – near Manchester I think; he went there on the basis that Saab sold more of these 3 litre diesels than Renault (and are cheaper). Anyone know which garage?

Re Renault dealers, one post speak well of Field Ltd at Hanley Swan near Malvern; also for Freestyle Renault in Brighton. But both are too far from the Lake District.

Cheers

20:48
October 16, 2014


alanclarke

Kent

Member

posts 51

2
0

google

dreaded 3.0DCI misfire vel satis alan clarke

and the first two returns will take you to the pages in the forum describing the solution to my shudder problem

After running beautifully for a year or so, the dreaded shudder came back. The car runs fine on a light throttle, even up to motorway speeds, and amazingly up steep hils. But ask it for more, say to overtake, it shudders as if starved of fuel. Lift off throttle and it recovers. The good news is that it is usable so long as i drive like an oldie (which i am), but not being able to overtake is a problem.

My indepenedent garage has diagnosed low fuel pressure viz

Idling: 280 bar which is correct

Light load 700 bar

Under load, 650, then 500, then less than 100; it should go up to 1,000bar; hence the symptom of fuel starvation.

Lift off: returns to 500 bar

The fuel supply line from tank to engine is fine.

The garage says he is stuck and does not know what to do.

So…. a diesel specialist reckoned he fixed this once before by cleaning a contact on the fuel pressure regulator. I am not convinced.

Anyone any ideas? And don't say get rid of it and get a 3.5 Brad.

Also i would like to ask a garage with experience of this engine. Someone had a good result from a Saab garage – near Manchester I think; he went there on the basis that Saab sold more of these 3 litre diesels than Renault (and are cheaper). Anyone know which garage?

Re Renault dealers, one post speak well of Field Ltd at Hanley Swan near Malvern; also for Freestyle Renault in Brighton. But both are too far from the Lake District.

Cheers

20:53
October 16, 2014


alanclarke

Kent

Member

posts 51

3
0

Oliver used the SAAB specialist in Glossop for his cambelt change

22:52
October 16, 2014


AndrewS

Guest

4
0

Hi Alan. Thanks a lot for answering both questions. Now have a way forward. Andrew

09:40
October 17, 2014


lexi

Guest

5
0

Hi Andrew

                    Have you priced the regulator up?  

06:44
October 18, 2014


AndrewS

Guest

6
0

Hi Lexi, no I have not priced the regulator. On Tuesday afternoon it is going to the local diesel specialist. Last time it happened he reckoned it was due to a poor electrical connection to the regulator, whcih he cleaned, so have to let him prove/eliminate that first. But thinking about it I will get a price sa as to be prepared. Andrew

17:05
October 29, 2014


AndrewS

Guest

7
0

So car back from diesel specialist, and it is running beautifully again. He said it was fuel starvation, but did not say what he did to sort it. However it was not something expensive like solenoids etc. Being very cautious, he has not billed me yet, and wants me to run it for a couple of weeks to ensure the fix is permanent.

Now I can get a front suspension rattle sorted, and two new front tyres. Did not want to spend on that incase the engine problem was terminal.

Then a cosmetic job to fix hole in leading edge of front n/s wing, or fit a replacement wing.

Then several small items viz : driver door stay creaking &  flexing, satin finish door handles, refurbish alloy wheels (but a wheel refurbisher said they were running slightly out if true so not worth refurbishing Cry, tyre pressure monitor faulty, driver’s heated seat stopped working, front reading lights stopped working, rusty wheels nuts, start button light, climate control light, silver door trim both sides (no longer available?) …and so it goes on

My original plan to chip it and get a "year anonymous" number plate is getting no nearer Smile

17:52
October 29, 2014


lexi

Guest

8
0

 Good news on engine.

 

       You might never get round that list Andrew with winter approachingLaugh

22:19
October 29, 2014


AndrewS

Guest

9
0

Too right Lexi; however tyres and suspension are being done tomorrow, then I will see about the wing damage. The rest are nice to haves and can wait. Might do the door handles if easy to replace.

08:57
October 30, 2014


tonyrome

Guest

10
0

AndrewS said:

Might do the door handles if easy to replace.

Easy to replace? Yes. Have you seen the price, though? Wink

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