Rover 75 cdti cutting off

Jaime · 8th April 2022, 05:29

Hi,
I have been checking all the posts concerning the engine cut off on a Rover 75 cdti 2005 and I did all the recommendations. But still the same problem cutting off above 3500 rpm.

The T4 check a p1260 Low pressure problem and a p1190, High pressure too high.
When car cut off, T4 shows above 4.5 Amp on the high pressure regulator.

What I have done :

Check the ECU engine, change by another ECU kit, still the problem.

Change fuel pump inside tank but still the same

HP pump new seals and new pressure regulator Bosch, still the same

clean Map and change it , still the same

Change common rail pressure sensor, still the same
Change fuel filter, still the same

Check injectors and change 2 of them, corrections above 0.5 and 0.8 for all of them now

Could be a return fuel stuck somewhere causing this problem, or may be the HP pump itself?

Please any advice is appreciated,
How to interpret such a high amperage shown by the T4 on the fuel pressure regulator?

MAF is disconnected by the way

Thanks

COLVERT · 9th April 2022, 21:17

An old and failing crank sensor has been known to start cutting out at high engine revs.

dave lincs · 10th April 2022, 07:49

As Colvert has said I would go with the crank sensor

Yorkshire GOC · 10th April 2022, 10:12

Beside the possibility of a failing crank sensor - does your car have the 2nd under bonnet fuel pump beside the in tank fuel pump ? If so i would check it - a failing one may be the cause of your problem

8th April 2022, 05:29	#1
Jaime Newbie Rover 75 Saloon Join Date: Jul 2012 Location: Paris Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	Rover 75 cdti cutting off Hi, I have been checking all the posts concerning the engine cut off on a Rover 75 cdti 2005 and I did all the recommendations. But still the same problem cutting off above 3500 rpm. The T4 check a p1260 Low pressure problem and a p1190, High pressure too high. When car cut off, T4 shows above 4.5 Amp on the high pressure regulator. What I have done : Check the ECU engine, change by another ECU kit, still the problem. Change fuel pump inside tank but still the same HP pump new seals and new pressure regulator Bosch, still the same clean Map and change it , still the same Change common rail pressure sensor, still the same Change fuel filter, still the same Check injectors and change 2 of them, corrections above 0.5 and 0.8 for all of them now Could be a return fuel stuck somewhere causing this problem, or may be the HP pump itself? Please any advice is appreciated, How to interpret such a high amperage shown by the T4 on the fuel pressure regulator? MAF is disconnected by the way Thanks Last edited by Jaime; 8th April 2022 at 05:35..

10th April 2022, 10:12	#4
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,063 Thanks: 1,842 Thanked 623 Times in 469 Posts	Beside the possibility of a failing crank sensor - does your car have the 2nd under bonnet fuel pump beside the in tank fuel pump ? If so i would check it - a failing one may be the cause of your problem __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

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9th April 2022, 21:17	#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	An old and failing crank sensor has been known to start cutting out at high engine revs.

10th April 2022, 07:49	#3
dave lincs Posted a thing or two Rover 75 Saloon Join Date: Mar 2014 Location: Louth Posts: 1,409 Thanks: 380 Thanked 986 Times in 476 Posts	As Colvert has said I would go with the crank sensor