Rover 75 fuel problem

Rsnail · 12th March 2023, 08:57

Hi guys, yesterday I had only a quick half a mile run with the car (a 2.0 V6, year 2000), shut the engine off for a quick half a minute stop, turned it on again, then it started running rough for a few seconds (at very low revs acting like it was about to die), then it suddenly stopped. Now when trying to crank it up, it just cranks but won't start. Thought I had no fuel, so put 10 liters of fuel in the tank, cranked, but still nothing. Then decided to unplug the fuel pipe from the top right part of the intake manifold (above the throttle body) to see if the pump is sending fuel, unplugged it, cranked the engine, but 0 fuel was coming from the pipe. Any thoughts? The camshaft position sensor was replaced some months ago because for that being faulty before, I was having similar problems (car cranked but didn't start), so I don't think that would be the problem again, especially if now the first time that this problem arised, the engine stopped meanwhile it was running

vitesse · 12th March 2023, 10:31

Any fault codes?

Does the rev counter move (bounce) when cranking? If not suspect crankshaft sensor.

Regards

Yorkshire GOC · 12th March 2023, 11:21

Car would not start at all with a faulty cam sensor - so as said a faulty crank sensor maybe the culprit as she started then cut out - it can cause non starts and cut outs/stalls.

Rsnail · 12th March 2023, 17:31

Rev counter doesn't move when cranking. Is this definitive evidence that it's the crank sensor? And if so, does it even have a fault code or it just dies and shows no error?

vitesse · 12th March 2023, 18:01

A faulty crank sensor usually throws up a fault code, as to whether the lack of movement is definitive evidence - I can only say that's what I've learnt during my time here.

A fault code and the lack of a bouncy rev-counter, would definitely confirm it.

Regards

ps I believe the fuel pump relay also requires a signal from the crank sensor, so your description seems to confirm it

Rsnail · 12th March 2023, 18:01

And one more thing, even if the crank sensor would be the culprit, why doesn't the fuel rail spit out any fuel whencranking? Is this what would normally happen when the crank sensor would be faulty?

vitesse · 12th March 2023, 18:46

Read my reply again especially the ps. bit ... after the initial priming process the fuel pump relay needs the crankshaft sensor input.

Regards

Rsnail · 12th March 2023, 19:39

Thank you guys! Will pull up the diagnostics and see what it gives me. Hopefully it'll show the crank sensor and I won't have to dig any further

bluemalbert · 12th March 2023, 20:09

if its not the crank sensor, check for 'Fuel Filter Syndrome' I had the exact symptoms a couple of months back. The fault is in the tank (mine is a petrol engine - dont know if the diesel models are the same, if thats what you have)
the filter is in 2 bits and they vibrate apart causing no fuel pressure and your symptoms. There is lots of advice on the forum - just search. The remedy is a clip which you can get from ebay, once fitted it keeps the 2 parts of the filter together, and so maintaining the pressure.
If you search my posts, youll find my thread with valuable contributions from the experienced guys on here. Good luck!

Rsnail · 12th March 2023, 22:12

P0108 - Manifold absolute pressure/barometric pressure circuit high input
short to V batt
sporadic error

This is the only error coming out, any ideas?

And @bluemalbert, thanks for the info, will check for that, could you however be more specific with that clip and what's it called? Regarding the fuel pump, I understood that the pre 2001 models, like mine (2000), shouldn't have this problem (maybe???), somebody please correct me if I'm wrong

12th March 2023, 08:57	#1
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Rover 75 fuel problem Hi guys, yesterday I had only a quick half a mile run with the car (a 2.0 V6, year 2000), shut the engine off for a quick half a minute stop, turned it on again, then it started running rough for a few seconds (at very low revs acting like it was about to die), then it suddenly stopped. Now when trying to crank it up, it just cranks but won't start. Thought I had no fuel, so put 10 liters of fuel in the tank, cranked, but still nothing. Then decided to unplug the fuel pipe from the top right part of the intake manifold (above the throttle body) to see if the pump is sending fuel, unplugged it, cranked the engine, but 0 fuel was coming from the pipe. Any thoughts? The camshaft position sensor was replaced some months ago because for that being faulty before, I was having similar problems (car cranked but didn't start), so I don't think that would be the problem again, especially if now the first time that this problem arised, the engine stopped meanwhile it was running Last edited by Rsnail; 12th March 2023 at 09:02..

12th March 2023, 11:21	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,089 Thanks: 1,842 Thanked 623 Times in 469 Posts	Car would not start at all with a faulty cam sensor - so as said a faulty crank sensor maybe the culprit as she started then cut out - it can cause non starts and cut outs/stalls. __________________ 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.

12th March 2023, 10:31	#2
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,575 Thanks: 395 Thanked 823 Times in 652 Posts	Any fault codes? Does the rev counter move (bounce) when cranking? If not suspect crankshaft sensor. Regards

12th March 2023, 17:31	#4
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Rev counter doesn't move when cranking. Is this definitive evidence that it's the crank sensor? And if so, does it even have a fault code or it just dies and shows no error?

12th March 2023, 18:01	#5
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,575 Thanks: 395 Thanked 823 Times in 652 Posts	A faulty crank sensor usually throws up a fault code, as to whether the lack of movement is definitive evidence - I can only say that's what I've learnt during my time here. A fault code and the lack of a bouncy rev-counter, would definitely confirm it. Regards ps I believe the fuel pump relay also requires a signal from the crank sensor, so your description seems to confirm it

12th March 2023, 18:46	#7
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,575 Thanks: 395 Thanked 823 Times in 652 Posts	Read my reply again especially the ps. bit ... after the initial priming process the fuel pump relay needs the crankshaft sensor input. Regards

12th March 2023, 19:39	#8
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Thank you guys! Will pull up the diagnostics and see what it gives me. Hopefully it'll show the crank sensor and I won't have to dig any further

12th March 2023, 20:09	#9
bluemalbert Avid contributor MG ZT 190 Join Date: Apr 2016 Location: Heathrow Posts: 166 Thanks: 109 Thanked 24 Times in 14 Posts	if its not the crank sensor, check for 'Fuel Filter Syndrome' I had the exact symptoms a couple of months back. The fault is in the tank (mine is a petrol engine - dont know if the diesel models are the same, if thats what you have) the filter is in 2 bits and they vibrate apart causing no fuel pressure and your symptoms. There is lots of advice on the forum - just search. The remedy is a clip which you can get from ebay, once fitted it keeps the 2 parts of the filter together, and so maintaining the pressure. If you search my posts, youll find my thread with valuable contributions from the experienced guys on here. Good luck!

12th March 2023, 22:12	#10
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	P0108 - Manifold absolute pressure/barometric pressure circuit high input short to V batt sporadic error This is the only error coming out, any ideas? And @bluemalbert, thanks for the info, will check for that, could you however be more specific with that clip and what's it called? Regarding the fuel pump, I understood that the pre 2001 models, like mine (2000), shouldn't have this problem (maybe???), somebody please correct me if I'm wrong