Misfiring 2.0l V6 - Page 2

mh007 · 13th April 2012, 20:29

I've never known a faulty ABS sensor put the car into limp-home mode before although I suppose the O/S front could as it also operates the speedo (if I remember correctly)
In any case, going into limp-home mode wouldn't cause a 'misfire' as the OP has posted.
Limp-home mode just limits how far the engine can rev & sets everything to a default value just to "get you home"
The engine management (MIL) light would also illuminate.
With an ABS fault, the ABS light would illuminate (sorry for stating the obvious there)
I'd be astonished if replacing a faulty ABS sensor cured an engine misfire !!

Gazmo65 · 13th April 2012, 21:02

might sound stupid but have you checked the wiring harness at the coils end, pull the outer sleeve and rubber cap back and check along the harness for chaffed wiring,there are only 2 cables at each plug but have a look along the cables about 2 inches as they disappear into the outer covering, this can sometimes be a problem,and if the missfire is caused by this it can damage the ECU

senojrg · 14th April 2012, 09:34

Thanks synchromesh - will mention that to the garage on Tuesday. I am hoping that the problem is not too drastic.
Ray

Synchromesh · 19th April 2012, 11:50

Quote:

Originally Posted by senojrg

Thanks synchromesh - will mention that to the garage on Tuesday. I am hoping that the problem is not too drastic.
Ray

Did the garage fix your misfire problem on Tuesday?

SD1too · 19th April 2012, 12:40

O.P. feedback in new thread here:

http://www.the75andztclub.co.uk/foru...d.php?t=111389

Simon.

Hogwarzt · 19th April 2012, 19:44

Might be obvious but have the leads been replaced correctly as I believe that a pair should be crossed, if not would give a mis-fire like problem!

senojrg · 20th April 2012, 08:00

Grateful thanks to all the members who took the time to post some very helpful advice. I booked the car in at the Beech Hill garage (Rover/MG specialists) on Tuesday and they diagnosed faulty coils on cylinders 1 and 3 (front bank). They had parts in stock and fitted them. The coils were £144 each and with labour/Vat the total bill was £431 - much lower than I feared it would be. So I am up and running again which is a big relief.
Thanks again.
Ray

14th April 2012, 09:34	#13
senojrg Newbie Rover75 Saloon Join Date: May 2009 Location: Reading Posts: 13 Thanks: 0 Thanked 0 Times in 0 Posts	Reply Thanks synchromesh - will mention that to the garage on Tuesday. I am hoping that the problem is not too drastic. Ray

19th April 2012, 12:40	#15
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,379 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	O.P. feedback in new thread here: http://www.the75andztclub.co.uk/foru...d.php?t=111389 Simon. __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

19th April 2012, 19:44	#16
Hogwarzt Gets stuck in MG ZT CDTI 170BHP, PUG CC 180 Sport Join Date: Feb 2011 Location: Leeds Posts: 659 Thanks: 4 Thanked 18 Times in 14 Posts	Might be obvious but have the leads been replaced correctly as I believe that a pair should be crossed, if not would give a mis-fire like problem! Last edited by Hogwarzt; 19th April 2012 at 19:48..

13th April 2012, 20:29	#11
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	I've never known a faulty ABS sensor put the car into limp-home mode before although I suppose the O/S front could as it also operates the speedo (if I remember correctly) In any case, going into limp-home mode wouldn't cause a 'misfire' as the OP has posted. Limp-home mode just limits how far the engine can rev & sets everything to a default value just to "get you home" The engine management (MIL) light would also illuminate. With an ABS fault, the ABS light would illuminate (sorry for stating the obvious there) I'd be astonished if replacing a faulty ABS sensor cured an engine misfire !!

13th April 2012, 21:02	#12
Gazmo65 Loves to post Volvo S80 Join Date: Feb 2010 Location: Burton Latimer Posts: 268 Thanks: 11 Thanked 39 Times in 20 Posts	might sound stupid but have you checked the wiring harness at the coils end, pull the outer sleeve and rubber cap back and check along the harness for chaffed wiring,there are only 2 cables at each plug but have a look along the cables about 2 inches as they disappear into the outer covering, this can sometimes be a problem,and if the missfire is caused by this it can damage the ECU

20th April 2012, 08:00	#17
senojrg Newbie Rover75 Saloon Join Date: May 2009 Location: Reading Posts: 13 Thanks: 0 Thanked 0 Times in 0 Posts	Grateful thanks to all the members who took the time to post some very helpful advice. I booked the car in at the Beech Hill garage (Rover/MG specialists) on Tuesday and they diagnosed faulty coils on cylinders 1 and 3 (front bank). They had parts in stock and fitted them. The coils were £144 each and with labour/Vat the total bill was £431 - much lower than I feared it would be. So I am up and running again which is a big relief. Thanks again. Ray