High idle when cold engine MG V6 190

janker · 25th November 2019, 22:09

Hi everybody

I wonder if someone could advise me when my car starts it idles at about 1300/1400 rpm when cold and when comes up to temp drops to about 750/800.
its seems to be really racing on startup, Any ideas of things i should try, please.
thanks, Julian

M17TT · 25th November 2019, 22:45

They do idle a bit high when cold anyway but shouldn't be trying to race away. First two ports of call would be iacv and vacuum pipes, especially the T section under the engine cover which is common for breaking apart.

janker · 28th November 2019, 21:09

Cheers for suggestions but cant see any leaks or breaks it revs at about 1500 when cold and gradually drops down to about 750 as it warms up ,Its just seems high when coming to junctions when cold anymore ideas please,Also the idle speed control valve has been replaced by previous owner.
thanks julian

SD1too · 29th November 2019, 07:58

Quote:

Originally Posted by janker

Also the idle speed control valve has been replaced by previous owner.

Hi Julian,

Don't take Mr. Previous Owner's word for it, take it to pieces and check that the parts look as if they've been recently fitted. While you're at it, inspect the electrical connector closely to make sure that the terminals are clean and a good fit.

Simon

janker · 13th December 2019, 11:00

Update removed the idle valve and gave it a clean replaced gasket and seal and rpm have dropped from 1500 to 1100 when cold so all good must of been sucking air into valve,Was really prity clean inside so im thinking the gasket or seal was my culprit.
Cheers everybody for the help appreciated.
julian

25th November 2019, 22:09	#1
janker Loves to post Rover 75 Saloon & MGZT 190 Join Date: Jun 2012 Location: Leek Posts: 390 Thanks: 333 Thanked 57 Times in 39 Posts	High idle when cold engine MG V6 190 Hi everybody I wonder if someone could advise me when my car starts it idles at about 1300/1400 rpm when cold and when comes up to temp drops to about 750/800. its seems to be really racing on startup, Any ideas of things i should try, please. thanks, Julian __________________ This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol.

28th November 2019, 21:09	#3
janker Loves to post Rover 75 Saloon & MGZT 190 Join Date: Jun 2012 Location: Leek Posts: 390 Thanks: 333 Thanked 57 Times in 39 Posts	Cheers for suggestions but cant see any leaks or breaks it revs at about 1500 when cold and gradually drops down to about 750 as it warms up ,Its just seems high when coming to junctions when cold anymore ideas please,Also the idle speed control valve has been replaced by previous owner. thanks julian __________________ This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol. Last edited by janker; 28th November 2019 at 21:15..

13th December 2019, 11:00	#5
janker Loves to post Rover 75 Saloon & MGZT 190 Join Date: Jun 2012 Location: Leek Posts: 390 Thanks: 333 Thanked 57 Times in 39 Posts	Update removed the idle valve and gave it a clean replaced gasket and seal and rpm have dropped from 1500 to 1100 when cold so all good must of been sucking air into valve,Was really prity clean inside so im thinking the gasket or seal was my culprit. Cheers everybody for the help appreciated. julian __________________ This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol.

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25th November 2019, 22:45	#2
M17TT Banned MG ZT Join Date: Dec 2014 Location: Potters Bar Posts: 151 Thanks: 4 Thanked 51 Times in 23 Posts	They do idle a bit high when cold anyway but shouldn't be trying to race away. First two ports of call would be iacv and vacuum pipes, especially the T section under the engine cover which is common for breaking apart.