Rover 75 2.5 V6 flat spot on accelerating

Bobbybiscuit · 27th June 2014, 14:28

I have had a flat spot which from what I read on here is due to a sensor.

What is the name of the sensor and where is the best play to buy one please?

I tried looking on the Europarts web site but I was not sure what I was looking for.

It seems that it is a job I can do myself but the problem is getting out the screws holding the sensor in.

Cheers

James.uk · 27th June 2014, 14:55

You sure it's not a VIS problem?

Vis-a-vis you need them reconditioned.

...

KWIL · 27th June 2014, 15:11

Flat spot at which RPM?

Simon.h · 27th June 2014, 16:36

Quote:

Originally Posted by KWIL

Flat spot at which RPM?

I bet its between 3000-4000rpm!

Bobbybiscuit · 27th June 2014, 17:32

No from still ! especially when i want to pull away fast. Quite alot of info on this forum suggesting its a common problem. It could be Vis as mine have been tested and not working. Could be the ignition is not advancing.

Last14 · 28th June 2014, 21:14

Quote:

Originally Posted by Bobbybiscuit

No from still ! especially when i want to pull away fast. Quite alot of info on this forum suggesting its a common problem. It could be Vis as mine have been tested and not working. Could be the ignition is not advancing.

.....if your VIS has been tested and is not working, i'd say it is that....but having had similar symptons (on my ZT190) and changing my power-VIS it didnt resolve issue. So next to check is the balance-VIS. Otherwise the coil packs....?

Does it do it when the engine is cold? Mine only does it when warmed up. So within say 5mins of driving.

Anon3 · 29th June 2014, 06:39

My money say both VIS motors need testing.
With a big stake on the balance VIS (the back one) being the problem

This is exactly the problem I saw, with no power off the mark.

stocktake · 29th June 2014, 08:38

My typhoon 190 did this ( Err... my vis motors are working

) Nightmare to move off from standing, needed silly revs. I thought I had forgotten how to use a clutch at one point it was hopeless. Map sensor replacement cured it

. I will have the part no somewhere.... back in a Mo........

Edit: rimmers part no

MHK100820 £80

or,

http://www.ebay.co.uk/itm/Map-Sensor...item462042eba7

or,
Borrow one from a friend ( 2mins to remove/refit) and make sure this is the problem

Bobbybiscuit · 29th June 2014, 21:07

Thanks for help. I too have to have high revs and let clutch out slowly to pull away slowly or will stall or car will jerk. Also when I have to slip it in to second.

The problem is not so bad when starting with a cold engine but that may be because the automatic choke is in operation. Only a thought.

Bobbybiscuit · 29th June 2014, 21:27

You say its a 2 min job but where is the sensor located please?

I have read somewhere that the are held in with those silly star screw thingy's. Where do I get one to fit the screws? Dont want to pay mega bucks.

27th June 2014, 14:28	#1
Bobbybiscuit Avid contributor Rover 75 Classic SE Join Date: Sep 2011 Location: Plymouth Posts: 164 Thanks: 31 Thanked 23 Times in 14 Posts	Rover 75 2.5 V6 flat spot on accelerating I have had a flat spot which from what I read on here is due to a sensor. What is the name of the sensor and where is the best play to buy one please? I tried looking on the Europarts web site but I was not sure what I was looking for. It seems that it is a job I can do myself but the problem is getting out the screws holding the sensor in. Cheers

27th June 2014, 17:32	#5
Bobbybiscuit Avid contributor Rover 75 Classic SE Join Date: Sep 2011 Location: Plymouth Posts: 164 Thanks: 31 Thanked 23 Times in 14 Posts	No from still ! especially when i want to pull away fast. Quite alot of info on this forum suggesting its a common problem. It could be Vis as mine have been tested and not working. Could be the ignition is not advancing. Last edited by Bobbybiscuit; 27th June 2014 at 17:36..

29th June 2014, 06:39	#7
Anon3 Posted a thing or two Rover 75 Join Date: Mar 2014 Location: Birmingham Posts: 1,392 Thanks: 199 Thanked 219 Times in 187 Posts	My money say both VIS motors need testing. With a big stake on the balance VIS (the back one) being the problem This is exactly the problem I saw, with no power off the mark. __________________ [SIGPIC][/SIGPIC] Villa, Stella, Balti. It's Brummie latin that means, er...... Vis tester available to local V6 owners

29th June 2014, 08:38	#8
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,591 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	My typhoon 190 did this ( Err... my vis motors are working ) Nightmare to move off from standing, needed silly revs. I thought I had forgotten how to use a clutch at one point it was hopeless. Map sensor replacement cured it . I will have the part no somewhere.... back in a Mo........ Edit: rimmers part no MHK100820 £80 or, http://www.ebay.co.uk/itm/Map-Sensor...item462042eba7 or, Borrow one from a friend ( 2mins to remove/refit) and make sure this is the problem __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 29th June 2014 at 08:54..

27th June 2014, 14:55	#2
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	You sure it's not a VIS problem? Vis-a-vis you need them reconditioned. ...

27th June 2014, 15:11	#3
KWIL Precise Rover 75 Tourer 2.5KV6 Connoisseur SE Join Date: Mar 2013 Location: Fleet Posts: 2,954 Thanks: 630 Thanked 617 Times in 480 Posts	Flat spot at which RPM?

29th June 2014, 21:07	#9
Bobbybiscuit Avid contributor Rover 75 Classic SE Join Date: Sep 2011 Location: Plymouth Posts: 164 Thanks: 31 Thanked 23 Times in 14 Posts	Thanks for help. I too have to have high revs and let clutch out slowly to pull away slowly or will stall or car will jerk. Also when I have to slip it in to second. The problem is not so bad when starting with a cold engine but that may be because the automatic choke is in operation. Only a thought.

29th June 2014, 21:27	#10
Bobbybiscuit Avid contributor Rover 75 Classic SE Join Date: Sep 2011 Location: Plymouth Posts: 164 Thanks: 31 Thanked 23 Times in 14 Posts	You say its a 2 min job but where is the sensor located please? I have read somewhere that the are held in with those silly star screw thingy's. Where do I get one to fit the screws? Dont want to pay mega bucks.