Full pump failing ?

Dibdob69 · 4th February 2021, 19:59

Got a problem with my diesel 75, Just given it a good service inc fuel filter and it ran fine on the 1st day

Day 2 after standing on the brakes hard a few times trying to stop the brake peddle pulsing (didn't work

) the check engine light came on and the car would not rev, Limped the car home and found the EGR pipe had split, l had fitted a EGR bypass so l removed the pipe completely and fitted the blanking plate to the exhaust manifold.

Car is running better but it hesitates/misses slightly when pulling away or accelerating under 1500rpm.

Took it to my local garage and they found code P0110 Intake Air Temp Sensor which is the MAF sensor (i think) which was unplugged because I had fitted what l was told was a MAF less remapped ECU.

Anyway l have plugged the MAF back in but its still playing up.

One other thing that flashed up but disappeared was ITP Failing but all the stuff I have read about ITP failing is the engine stops at 1/4 full tank.

My fuel tank is a the 1/4 full mark.

Do these symptoms suggest fuel pump failure or could it be something else ?

COLVERT · 5th February 2021, 11:50

A simple test is to fill the fuel tank.----

Yorkshire GOC · 5th February 2021, 12:13

A neighbour had this issue on a ZT diesel with a quarter full tank - it was a failing under bonnet pump not the ITP.

DMGRS · 5th February 2021, 14:50

Usually failing around 1/4 is the in tank pump - but it's not a dead cert; it could be either.

We have the in tank pump here:
https://www.dmgrs.co.uk/products/in-...-2-pump-system

And the under-bonnet pump here:
https://www.dmgrs.co.uk/products/und...0481-wqb100482

Dibdob69 · 5th February 2021, 16:52

I put £20 of diesel in today (5/8 full tank) and its still playing up

Yorkshire GOC · 5th February 2021, 17:11

Mmm - might be worth doing a leak back test to discount/identify a faulty fuel injector which does seem pretty common on the diesel . A dodgy injector may cause the ITP error code to be generated

Arctic · 5th February 2021, 18:13

Quote:

Originally Posted by Dibdob69

Got a problem with my diesel 75, Just given it a good service inc fuel filter and it ran fine on the 1st day

Day 2 after standing on the brakes hard a few times trying to stop the brake peddle pulsing (didn't work

) the check engine light came on and the car would not rev, Limped the car home and found the EGR pipe had split, l had fitted a EGR bypass so l removed the pipe completely and fitted the blanking plate to the exhaust manifold.

Car is running better but it hesitates/misses slightly when pulling away or accelerating under 1500rpm.

Quote:

Took it to my local garage and they found code P0110 Intake Air Temp Sensor which is the MAF sensor (i think) which was unplugged because I had fitted what l was told was a MAF less remapped ECU.

Anyway l have plugged the MAF back in but its still playing up.

One other thing that flashed up but disappeared was ITP Failing but all the stuff I have read about ITP failing is the engine stops at 1/4 full tank.

My fuel tank is a the 1/4 full mark.

Do these symptoms suggest fuel pump failure or could it be something else ?

Hi Mark.
Where did you get the MAF less ECU from ? do you still have your own ECU, or do you mean you had your ECU mapped.

COLVERT · 5th February 2021, 19:17

How's that brake pedal ???--Is it still pulsing ??--( Anti-lock kicking in. )

Dibdob69 · 5th February 2021, 20:48

Quote:

Originally Posted by Arctic

Hi Mark.
Where did you get the MAF less ECU from ? do you still have your own ECU, or do you mean you had your ECU mapped.

Off a reputable rover tuner and l still have my original ECU.

Dibdob69 · 5th February 2021, 20:50

Quote:

Originally Posted by COLVERT

How's that brake pedal ???--Is it still pulsing ??--( Anti-lock kicking in. )

Yes

so I'm going to check the magnets on the hubs after l sort this problem out first

4th February 2021, 19:59	#1
Dibdob69 Newbie Rover 75 saloon Join Date: Dec 2020 Location: Royal Leamington Spa Posts: 28 Thanks: 10 Thanked 5 Times in 1 Post	Full pump failing ? Got a problem with my diesel 75, Just given it a good service inc fuel filter and it ran fine on the 1st day Day 2 after standing on the brakes hard a few times trying to stop the brake peddle pulsing (didn't work ) the check engine light came on and the car would not rev, Limped the car home and found the EGR pipe had split, l had fitted a EGR bypass so l removed the pipe completely and fitted the blanking plate to the exhaust manifold. Car is running better but it hesitates/misses slightly when pulling away or accelerating under 1500rpm. Took it to my local garage and they found code P0110 Intake Air Temp Sensor which is the MAF sensor (i think) which was unplugged because I had fitted what l was told was a MAF less remapped ECU. Anyway l have plugged the MAF back in but its still playing up. One other thing that flashed up but disappeared was ITP Failing but all the stuff I have read about ITP failing is the engine stops at 1/4 full tank. My fuel tank is a the 1/4 full mark. Do these symptoms suggest fuel pump failure or could it be something else ? Last edited by Dibdob69; 5th February 2021 at 03:53..

5th February 2021, 12:13	#3
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	A neighbour had this issue on a ZT diesel with a quarter full tank - it was a failing under bonnet pump not the ITP. __________________ 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.

5th February 2021, 14:50	#4
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,320 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	Usually failing around 1/4 is the in tank pump - but it's not a dead cert; it could be either. We have the in tank pump here: https://www.dmgrs.co.uk/products/in-...-2-pump-system And the under-bonnet pump here: https://www.dmgrs.co.uk/products/und...0481-wqb100482 __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

5th February 2021, 17:11	#6
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	Mmm - might be worth doing a leak back test to discount/identify a faulty fuel injector which does seem pretty common on the diesel . A dodgy injector may cause the ITP error code to be generated __________________ 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.

5th February 2021, 11:50	#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	A simple test is to fill the fuel tank.----

5th February 2021, 16:52	#5
Dibdob69 Newbie Rover 75 saloon Join Date: Dec 2020 Location: Royal Leamington Spa Posts: 28 Thanks: 10 Thanked 5 Times in 1 Post	I put £20 of diesel in today (5/8 full tank) and its still playing up

5th February 2021, 19:17	#8
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	How's that brake pedal ???--Is it still pulsing ??--( Anti-lock kicking in. )