Bought a dud

steady eddie · 18th August 2018, 20:54

Well for the first time ever I regret buying a car, we bought a Renault Espace Mk4 1.9 Dci it has an intermittent power fault that is proving to be difficult to sort out. I have had it diagnosed by two different people, both came up with the same fault codes but finding the root cause is not easy. When it is running well it is a nice drive but 60% of the time it runs rough. It misses as though it is starved of fuel, a new fuel regulator and rail pressure sensor have been fitted but made very little difference I have checked and cleaned all wiring connections even checked the ECU plugs and wiring. I don't know what to look at next it has had a new fuel filter the air filter is clean. I have cleaned the EGR valve and inlet manifold.

Mike Noc · 18th August 2018, 21:56

Back to basics is as good a place to start as any; look in the fuel tank for any signs of contamination and unplug and check all low pressure fuel pipes are clear.

What were the fault codes?

clf · 18th August 2018, 21:56

Quote:

Originally Posted by steady eddie

Well for the first time ever I regret buying a car, we bought a Renault Espace Mk4 1.9 Dci it has an intermittent power fault that is proving to be difficult to sort out. I have had it diagnosed by two different people, both came up with the same fault codes but finding the root cause is not easy. When it is running well it is a nice drive but 60% of the time it runs rough. It misses as though it is starved of fuel, a new fuel regulator and rail pressure sensor have been fitted but made very little difference I have checked and cleaned all wiring connections even checked the ECU plugs and wiring. I don't know what to look at next it has had a new fuel filter the air filter is clean. I have cleaned the EGR valve and inlet manifold.

A number of years ago, I was considering a 1.9 Laguna or Megane (not totally by choice). When trying to find common issues etc. the 1.5 dci was regarded the best choice (for the Megane - my father had one at the time, and aside from irritating issues with windows and keycard, he never had an issue). I cannot find the links now, but at that time, injectors were the cause of the issue, but the rough running would reoccur again when the new injectors failed.

My experience of Renault dealers is not great, and would suggest looking for a specialist. The renault forums used to be actually quite good for info. I use it when I have an issue with my mother's clio. A search is all it takes normally.

EXAMPLE

SCP440 · 19th August 2018, 10:25

A friend had a Laguna with the same problem, luckily for him it was a company car but even the dealer could never fix it completely. In the end it was put in the car pool and he was given another.

He lost all power one night in contraflow, he free wheeled into the coned area and it refused to start. The RAC turned up and hour later and of course it started up and he drove home with no further incident.

steady eddie · 19th August 2018, 16:08

Well it's the end of the road for the Espace the wife took it to Oxford to visit her mother, the engine has started knocking so I have taken one of the rover 75,s
over to rescue her and some of the grandchildren. I am awaiting the arrival of the RAC ro recover it back to home.��

al_dente · 19th August 2018, 20:05

On the bright side, if it's turned into a permanent problem you should be able to diagnose the fault.

Sent from my Redmi 4X using Tapatalk

marinabrian · 20th August 2018, 16:01

Renault CAN diagnostic system

+

steady eddie · 20th August 2018, 16:23

On the plus side I did not rush to sell the wifes tourer so she is back driving a proper car again.

Bogbrush82 · 20th August 2018, 16:57

Quote:

Renault

There's your problem.

On a more serious note, could the MAF sensor be toast?

nick0303 · 20th August 2018, 18:59

+1 on the MAF sensor.

Might also be worth checking the condition of the fuel filter. Metal swarf in the fuel filter return would indicate a worn high pressure fuel pump.

I had a Renault 1.9dci that gave me some issues a few months back.

Does the car rev freely in neutral? It should be hit the rev limiter around 4.5k rpm?

18th August 2018, 20:54	#1
steady eddie Loves to post rover 75 tourer / bmw e90 320d Join Date: Jul 2011 Location: Swindon Posts: 255 Thanks: 256 Thanked 48 Times in 24 Posts	Bought a dud Well for the first time ever I regret buying a car, we bought a Renault Espace Mk4 1.9 Dci it has an intermittent power fault that is proving to be difficult to sort out. I have had it diagnosed by two different people, both came up with the same fault codes but finding the root cause is not easy. When it is running well it is a nice drive but 60% of the time it runs rough. It misses as though it is starved of fuel, a new fuel regulator and rail pressure sensor have been fitted but made very little difference I have checked and cleaned all wiring connections even checked the ECU plugs and wiring. I don't know what to look at next it has had a new fuel filter the air filter is clean. I have cleaned the EGR valve and inlet manifold.

20th August 2018, 18:59	#10
nick0303 Newbie MG ZT-T 260 Join Date: Jan 2015 Location: Halesowen Posts: 28 Thanks: 9 Thanked 3 Times in 3 Posts	+1 on the MAF sensor. Might also be worth checking the condition of the fuel filter. Metal swarf in the fuel filter return would indicate a worn high pressure fuel pump. I had a Renault 1.9dci that gave me some issues a few months back. Does the car rev freely in neutral? It should be hit the rev limiter around 4.5k rpm? Last edited by nick0303; 20th August 2018 at 19:02..

18th August 2018, 21:56	#2
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,548 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Back to basics is as good a place to start as any; look in the fuel tank for any signs of contamination and unplug and check all low pressure fuel pipes are clear. What were the fault codes?

19th August 2018, 10:25	#4
SCP440 I really should get out more....... MG ZT-T 260 Join Date: Feb 2016 Location: Witney Posts: 2,504 Thanks: 6 Thanked 910 Times in 571 Posts	A friend had a Laguna with the same problem, luckily for him it was a company car but even the dealer could never fix it completely. In the end it was put in the car pool and he was given another. He lost all power one night in contraflow, he free wheeled into the coned area and it refused to start. The RAC turned up and hour later and of course it started up and he drove home with no further incident.

19th August 2018, 16:08	#5
steady eddie Loves to post rover 75 tourer / bmw e90 320d Join Date: Jul 2011 Location: Swindon Posts: 255 Thanks: 256 Thanked 48 Times in 24 Posts	Well it's the end of the road for the Espace the wife took it to Oxford to visit her mother, the engine has started knocking so I have taken one of the rover 75,s over to rescue her and some of the grandchildren. I am awaiting the arrival of the RAC ro recover it back to home.��

19th August 2018, 20:05	#6
al_dente Loves to post Rover 75 Tourer Join Date: Jun 2009 Location: Nr Telford, Shropshire Posts: 375 Thanks: 6 Thanked 15 Times in 15 Posts	On the bright side, if it's turned into a permanent problem you should be able to diagnose the fault. Sent from my Redmi 4X using Tapatalk

20th August 2018, 16:01	#7
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	Renault CAN diagnostic system +

20th August 2018, 16:23	#8
steady eddie Loves to post rover 75 tourer / bmw e90 320d Join Date: Jul 2011 Location: Swindon Posts: 255 Thanks: 256 Thanked 48 Times in 24 Posts	On the plus side I did not rush to sell the wifes tourer so she is back driving a proper car again.