Engine cuts off on higher ravs

Adamsphotoart · 1st November 2021, 09:39

It happened already 3 times !

When I try to accelerate hard(er), say above 3k ravs and I keep it for a moment the engine cuts off. I hear some kind of phuff and the engine cuts off, then pressing the acceleration pedal doesn't help. The only remedy is to quickly turn off and then on the ignition key, the engine starts again and I can drive.

The above situation happens when I try to be a bit more aggressive with the acceleration but when I drive gently it does not happen.

Any idea what is it?

The car is Rover 75 diesel (220 k miles), remap to 160 hp plus the egr is bypassed (blank).

Thanks a lot for your help.

Adam

COLVERT · 1st November 2021, 11:08

It's possible for the crank shaft sensor to begin to fail in this manner at high revs.

Adamsphotoart · 1st November 2021, 11:16

Thank you so this would be the one?
https://www.dmgrs.co.uk/products/rov...-nsc100880-oem

Is it easy to locate and replace?

Also, and it might be my pure guess, which I forgot to mention... The high pressure fuel pump was leaking a bit last winter and I had a "quick" fix done on it, so it does not leak any more but I was advised to replace/refurbish the pump at some point. Could it be the high pressure injection pump getting faulty?

cheers,

Adam

dave lincs · 1st November 2021, 13:21

Quote:

Originally Posted by Adamsphotoart

Thank you so this would be the one?
https://www.dmgrs.co.uk/products/rov...-nsc100880-oem

Is it easy to locate and replace?

Also, and it might be my pure guess, which I forgot to mention... The high pressure fuel pump was leaking a bit last winter and I had a "quick" fix done on it, so it does not leak any more but I was advised to replace/refurbish the pump at some point. Could it be the high pressure injection pump getting faulty?

cheers,

Adam

Yes that is correct part and it takes 15 mins to change and is uner the starter motor, had one last week with same problem and this fixed it

Adamsphotoart · 1st November 2021, 17:19

Quote:

Originally Posted by dave lincs

Yes that is correct part and it takes 15 mins to change and is uner the starter motor, had one last week with same problem and this fixed it

Thanks a lot, it may do the trick. Although I am worried it might be also (or) the HPFP. It might be easier to start with the sensor.

grivas · 1st November 2021, 11:13

Quote:

Originally Posted by Adamsphotoart

It happened already 3 times !

When I try to accelerate hard(er), say above 3k ravs and I keep it for a moment the engine cuts off. I hear some kind of phuff and the engine cuts off, then pressing the acceleration pedal doesn't help. The only remedy is to quickly turn off and then on the ignition key, the engine starts again and I can drive.

The above situation happens when I try to be a bit more aggressive with the acceleration but when I drive gently it does not happen.

Any idea what is it?

The car is Rover 75 diesel (220 k miles), remap to 160 hp plus the egr is bypassed (blank).

Thanks a lot for your help.

Adam

It could be fuel delivery/pressure related, how many low pressure fuel pumps does the car have, if there is an under the bonnet one does it make any unusual noises, when was the last time the fuel filter changed?

Adamsphotoart · 1st November 2021, 11:18

Quote:

Originally Posted by grivas

It could be fuel delivery/pressure related, how many low pressure fuel pumps does the car have, if there is an under the bonnet one does it make any unusual noises, when was the last time the fuel filter changed?

The fuel filter was replaced 2 weeks ago.

I am not sure how many low pressure fuel pump are on this car, I guess one is in the tank and one is near the filer? I can hear any noise... But could it be the high pressure pump getting faulty?

Arctic · 1st November 2021, 11:48

Hi Adam.
With the car stationary will the car rev to 3k and above with out cutting out, if so then do a leak back test on the injectors, one or more could be leaking and when you call for power the car cuts out.

https://www.ebay.co.uk/itm/312803298...3ABFBM7N7MuJtf

Yorkshire GOC · 1st November 2021, 11:52

Quote:

Originally Posted by Arctic

Hi Adam.
With the car stationary will the car rev to 3k and above with out cutting out, if so then do a leak back test on the injectors, one or more could be leaking and when you call for power the car cuts out.

https://www.ebay.co.uk/itm/312803298...3ABFBM7N7MuJtf

You beat me to it

Adamsphotoart · 1st November 2021, 12:06

Quote:

Originally Posted by Arctic

Hi Adam.
With the car stationary will the car rev to 3k and above with out cutting out, if so then do a leak back test on the injectors, one or more could be leaking and when you call for power the car cuts out.

https://www.ebay.co.uk/itm/312803298...3ABFBM7N7MuJtf

Great, thanks a lot. I just went to test it:

the car was stationary (cold) and I could rav it up to 4.5 k (up to the red limit) and I could keep it for a while and the engine didn't cut out. I tried it several times and the engine didn't cut out even once... then I went to look at the high pressure fuel pump and yes, it was wet at the top

...

Does it mean the high pressure pump needs to be replaced to fix the problem?

1st November 2021, 09:39	#1
Adamsphotoart Regular poster Rover 75 Saloon Join Date: Mar 2013 Location: London Posts: 50 Thanks: 16 Thanked 5 Times in 3 Posts	Engine cuts off on higher ravs It happened already 3 times ! When I try to accelerate hard(er), say above 3k ravs and I keep it for a moment the engine cuts off. I hear some kind of phuff and the engine cuts off, then pressing the acceleration pedal doesn't help. The only remedy is to quickly turn off and then on the ignition key, the engine starts again and I can drive. The above situation happens when I try to be a bit more aggressive with the acceleration but when I drive gently it does not happen. Any idea what is it? The car is Rover 75 diesel (220 k miles), remap to 160 hp plus the egr is bypassed (blank). Thanks a lot for your help. Adam

1st November 2021, 11:48	#8
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,727 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Hi Adam. With the car stationary will the car rev to 3k and above with out cutting out, if so then do a leak back test on the injectors, one or more could be leaking and when you call for power the car cuts out. https://www.ebay.co.uk/itm/312803298...3ABFBM7N7MuJtf __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

1st November 2021, 11:08	#2
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	It's possible for the crank shaft sensor to begin to fail in this manner at high revs.

1st November 2021, 11:16	#3
Adamsphotoart Regular poster Rover 75 Saloon Join Date: Mar 2013 Location: London Posts: 50 Thanks: 16 Thanked 5 Times in 3 Posts	Thank you so this would be the one? https://www.dmgrs.co.uk/products/rov...-nsc100880-oem Is it easy to locate and replace? Also, and it might be my pure guess, which I forgot to mention... The high pressure fuel pump was leaking a bit last winter and I had a "quick" fix done on it, so it does not leak any more but I was advised to replace/refurbish the pump at some point. Could it be the high pressure injection pump getting faulty? cheers, Adam