V6 strange running

ProfDave · 8th June 2015, 19:13

OK started work on the Duotone tourer today

New oil and filters; new plugs; new lower mount; new Rad cap. All good and no leaks

however when she starts she is running at very low revs indeed; blip the throttle and she revs great and then on the overrun the revs drop almost to nothing. Can also stall at this point. Also I would say running on the rich side.

Could this relate to malfunctioning vis motors?? Or what else?? Olde fuel??? Its been very neglected. I shall be putting the interior back in tomorrow I think as its dry now inside

MrDoodles · 8th June 2015, 19:20

What plugs have you fitted?

RodgerD · 8th June 2015, 19:41

Quote:

Originally Posted by ProfDave

OK started work on the Duotone tourer today

New oil and filters; new plugs; new lower mount; new Rad cap. All good and no leaks

however when she starts she is running at very low revs indeed; blip the throttle and she revs great and then on the overrun the revs drop almost to nothing. Can also stall at this point. Also I would say running on the rich side.

Could this relate to malfunctioning vis motors?? Or what else?? Olde fuel??? Its been very neglected. I shall be putting the interior back in tomorrow I think as its dry now inside

VIS motors shouldn't affect idle. I'd clean out the AICV first, it lives on top of the throttle body. There's a spares replacement kit available.

ProfDave · 8th June 2015, 19:41

Quote:

Originally Posted by MrDoodles

What plugs have you fitted?

Bosch ones; it was doing it before too. Thought they might have been to blame and the old ones in the back had been there an age (the front were new!)

ProfDave · 8th June 2015, 19:42

Quote:

Originally Posted by RodgerD

VIS motors shouldn't affect idle. I'd clean out the AICV first, it lives on top of the throttle body. There's a spares replacement kit available.

what does this do??

MrDoodles · 8th June 2015, 20:53

Quote:

Originally Posted by ProfDave

Bosch ones; it was doing it before too. Thought they might have been to blame and the old ones in the back had been there an age (the front were new!)

Ed used to do this when cold, but a set of NGK Iridium plugs sorted it!

minimutly · 8th June 2015, 23:12

Assuming the cam timing is correct, it looks likely it's the idle control valve. Sounds like it's stuck closed (or failed altogether)
Plugs would cause it to missfire, and contrary to popular opinion, k series aren't sensitive to plug types.

trikey · 8th June 2015, 23:16

Like Rogerd says, get a throttle body rebuild kit from rimmers, dead cheap and easy to fit too, this will sort out your problem.

ProfDave · 9th June 2015, 06:26

Thanks chaps; I have one of the kits in the garage I think; will take a look later on. Seems a consensus has gathered and it should be easy to fix

When she is back together and running properly I will get Wyn over to the shed to plug in his magic box!

8th June 2015, 19:13	#1
ProfDave This is my second home ZTT, Contemp Saloon, Duotone Tourer Join Date: May 2012 Location: Llandeilo Posts: 4,192 Thanks: 290 Thanked 387 Times in 333 Posts	V6 strange running OK started work on the Duotone tourer today New oil and filters; new plugs; new lower mount; new Rad cap. All good and no leaks however when she starts she is running at very low revs indeed; blip the throttle and she revs great and then on the overrun the revs drop almost to nothing. Can also stall at this point. Also I would say running on the rich side. Could this relate to malfunctioning vis motors?? Or what else?? Olde fuel??? Its been very neglected. I shall be putting the interior back in tomorrow I think as its dry now inside

8th June 2015, 23:16	#8
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,772 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Like Rogerd says, get a throttle body rebuild kit from rimmers, dead cheap and easy to fit too, this will sort out your problem. __________________ Lest we forget..

8th June 2015, 19:20	#2
MrDoodles Banned MG ZT+ V6 190 Join Date: Nov 2011 Location: Spalding Posts: 13,245 Thanks: 369 Thanked 1,196 Times in 818 Posts	What plugs have you fitted?

8th June 2015, 23:12	#7
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	Assuming the cam timing is correct, it looks likely it's the idle control valve. Sounds like it's stuck closed (or failed altogether) Plugs would cause it to missfire, and contrary to popular opinion, k series aren't sensitive to plug types.

9th June 2015, 06:26	#9
ProfDave This is my second home ZTT, Contemp Saloon, Duotone Tourer Join Date: May 2012 Location: Llandeilo Posts: 4,192 Thanks: 290 Thanked 387 Times in 333 Posts	Thanks chaps; I have one of the kits in the garage I think; will take a look later on. Seems a consensus has gathered and it should be easy to fix When she is back together and running properly I will get Wyn over to the shed to plug in his magic box!