Starting difficulties Rover 75 2.5 2001

ankapetus · 21st February 2019, 13:25

Dear all engine doctors!

My engine has since 3 months shown difficulties to start. The starter motor runs correct. When cranking I would say let´s call it hesitates to ignite. It is like you can here it is a bit doubtful if it will start or not. 99% of the trials it does.
But twice the following has happened: it is very difficult to here if it ignites/fires but fires a few times but gives up. If I give it more throttle no difference. So the first time I just let be standing for a week but tried to start e few times with the same bad result. Then suddenly one day it started like nothing had really been a problem. Next time I disconnected the battery for 10 minutes and now it started correctly.

I can feel when cranking that i seems to slowly get more and more difficult to get it started from starting trial to the next. When it is warm - no problem at all.

When it happened ther first time I had only washed a way with water some glycol and maybe something got wet. I once took a connection apart just under the camshaft sensor and my feeling was that it might have been positive.

The battery sems to be OK. I have charged it a bit extra.

Regards from a snowy southeast Sweden

ankapetus

Yorkshire GOC · 21st February 2019, 19:13

I am not a KV6 man - but crank sensor failing

- in a Turbo(my drive) first thing i would check are the ignition coils. Is your battery at 12.7 volts ish resting - if lower it may be your battery.

vitesse · 21st February 2019, 19:36

Get yourself a copy of TOAF, clear all old fault codes and see what new ones appear, it could save you a lot of effort. Or do you have any other code reader?

Sorry, but I don’t know anyone near you with TOAF, I’ve often suggested a national map of TOAF owners but nothing has come of it.

Not much snow left up here now.

Regards

camson66 · 22nd February 2019, 16:10

My 2002 Connie used to do that, Usually out of the blue it would just crank over and over. No pattern to it, maybe every few months, Then twice a week.
But if you left it a while, It would always suddenly start, as normal.
My local garage chappie cleaned camshaft sensor, I think.
And it's been ok a few months now,

Kind Regards

John

Good luck ;-)

ankapetus · 5th March 2019, 14:57

Dear John,

thank you very much forthe hint. I will try that.

ankapetus

ankapetus · 5th March 2019, 15:01

Dear GOC,

thanks for your quick reply. I will check the voltage.
I have heard of a problem with an orange clip or something in the fuel tank! Do you know about that. Beacause today it happened again and the car was standing for a few hours outside in the snow/rain weather and it could be interpreted that when it started the engine did not get enough fuel as it did not react as normal on the throttle.
Ankapetus

ankapetus · 5th March 2019, 15:04

Dear vitesse,

thanks. I dohave the TOAF and it has already helped mefinding the correct ABS sensor failing.
I will do directly as you proposed.

Regards

ankapetus

vitesse · 5th March 2019, 16:55

As your car is 2001 it should be safe from the orange clip problem.

My daughter's recently purchased 2001 V6 gave us many headaches (https://the75andztclub.co.uk/forum/s...d.php?t=286990) and that was a low fuel pressure problem, but it doesn't sound similar as yours start without problem when warm. Interesting to see if TOAF flags up any new codes.

Is this the same engine you rebuilt?

Sadly winter has returned, lots of snow and minus 14 forecast.

Regards

minimutly · 5th March 2019, 22:43

Sounds very similar to mine, spins over very quickly, two or three goes sometimes, other times fires normally. When it does take a while to fire up it's very unresponsive until it clears. (Ie I can't just stick it in reverse and move backwards on lock without it dying).
Cam sensor or fuel pump is my guess at the mo.

21st February 2019, 13:25	#1
ankapetus Newbie Rover 75 saloon, MG ZT-T 190 Join Date: Dec 2015 Location: Kalmar Posts: 29 Thanks: 12 Thanked 2 Times in 2 Posts	Starting difficulties Rover 75 2.5 2001 Dear all engine doctors! My engine has since 3 months shown difficulties to start. The starter motor runs correct. When cranking I would say let´s call it hesitates to ignite. It is like you can here it is a bit doubtful if it will start or not. 99% of the trials it does. But twice the following has happened: it is very difficult to here if it ignites/fires but fires a few times but gives up. If I give it more throttle no difference. So the first time I just let be standing for a week but tried to start e few times with the same bad result. Then suddenly one day it started like nothing had really been a problem. Next time I disconnected the battery for 10 minutes and now it started correctly. I can feel when cranking that i seems to slowly get more and more difficult to get it started from starting trial to the next. When it is warm - no problem at all. When it happened ther first time I had only washed a way with water some glycol and maybe something got wet. I once took a connection apart just under the camshaft sensor and my feeling was that it might have been positive. The battery sems to be OK. I have charged it a bit extra. Regards from a snowy southeast Sweden ankapetus

21st February 2019, 19:13	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,066 Thanks: 1,842 Thanked 623 Times in 469 Posts	I am not a KV6 man - but crank sensor failing - in a Turbo(my drive) first thing i would check are the ignition coils. Is your battery at 12.7 volts ish resting - if lower it may be your battery. __________________ 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.

22nd February 2019, 16:10	#4
camson66 Regular poster Rover 75 2002 2.5L Cons SE Auto Silver Join Date: May 2007 Location: Saffron Walden Posts: 64 Thanks: 52 Thanked 5 Times in 5 Posts	Starting difficulties Rover 75 2.5 2001 My 2002 Connie used to do that, Usually out of the blue it would just crank over and over. No pattern to it, maybe every few months, Then twice a week. But if you left it a while, It would always suddenly start, as normal. My local garage chappie cleaned camshaft sensor, I think. And it's been ok a few months now, Kind Regards John Good luck ;-)

21st February 2019, 19:36	#3
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,534 Thanks: 395 Thanked 823 Times in 652 Posts	Get yourself a copy of TOAF, clear all old fault codes and see what new ones appear, it could save you a lot of effort. Or do you have any other code reader? Sorry, but I don’t know anyone near you with TOAF, I’ve often suggested a national map of TOAF owners but nothing has come of it. Not much snow left up here now. Regards

5th March 2019, 14:57	#5
ankapetus Newbie Rover 75 saloon, MG ZT-T 190 Join Date: Dec 2015 Location: Kalmar Posts: 29 Thanks: 12 Thanked 2 Times in 2 Posts	Dear John, thank you very much forthe hint. I will try that. ankapetus

5th March 2019, 15:01	#6
ankapetus Newbie Rover 75 saloon, MG ZT-T 190 Join Date: Dec 2015 Location: Kalmar Posts: 29 Thanks: 12 Thanked 2 Times in 2 Posts	Dear GOC, thanks for your quick reply. I will check the voltage. I have heard of a problem with an orange clip or something in the fuel tank! Do you know about that. Beacause today it happened again and the car was standing for a few hours outside in the snow/rain weather and it could be interpreted that when it started the engine did not get enough fuel as it did not react as normal on the throttle. Ankapetus

5th March 2019, 15:04	#7
ankapetus Newbie Rover 75 saloon, MG ZT-T 190 Join Date: Dec 2015 Location: Kalmar Posts: 29 Thanks: 12 Thanked 2 Times in 2 Posts	Dear vitesse, thanks. I dohave the TOAF and it has already helped mefinding the correct ABS sensor failing. I will do directly as you proposed. Regards ankapetus

5th March 2019, 16:55	#8
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,534 Thanks: 395 Thanked 823 Times in 652 Posts	As your car is 2001 it should be safe from the orange clip problem. My daughter's recently purchased 2001 V6 gave us many headaches (https://the75andztclub.co.uk/forum/s...d.php?t=286990) and that was a low fuel pressure problem, but it doesn't sound similar as yours start without problem when warm. Interesting to see if TOAF flags up any new codes. Is this the same engine you rebuilt? Sadly winter has returned, lots of snow and minus 14 forecast. Regards

5th March 2019, 22:43	#9
minimutly Posted a thing or two mg zt Join Date: Mar 2014 Location: cardigan Posts: 1,087 Thanks: 28 Thanked 187 Times in 158 Posts	Sounds very similar to mine, spins over very quickly, two or three goes sometimes, other times fires normally. When it does take a while to fire up it's very unresponsive until it clears. (Ie I can't just stick it in reverse and move backwards on lock without it dying). Cam sensor or fuel pump is my guess at the mo.