2001 T4 wont run when cold...help!!

Neillyboy78 · Nov 14th, 2011, 20:26

I have owned a 2001 V40 T4 since July and 9 times out of 10 say it wont idle on a cold start.I have changed plugs which did'nt work....then i changed the CTS which seemed to work for a few days but is now worse than ever..My local garage said the problem could be due to blowing exhaust/cracked manifold which you can hear leaking from cold upsetting the mixture....Could this be the case?Anyone had simular problems?

960kg · Nov 15th, 2011, 18:16

Quote:

Originally Posted by Neillyboy78

I have owned a 2001 V40 T4 since July and 9 times out of 10 say it wont idle on a cold start.I have changed plugs which did'nt work....then i changed the CTS which seemed to work for a few days but is now worse than ever..My local garage said the problem could be due to blowing exhaust/cracked manifold which you can hear leaking from cold upsetting the mixture....Could this be the case?Anyone had simular problems?

i don`t know what you actually call a CTS! but it is not a cracked exhaust manifold as mine is cracked and does not present any problems when cold and any noise will disappear when warm or hot.

the engine temp. sensor dictates the mixture from cold all the way up to and including the proper running of the engine so unless you have an error code that says otherwise i would start here!

SonyVaio · Nov 15th, 2011, 18:29

As 960 says I'd start with the engine temp sensor (960kg is usually not far off the mark). This should be a fairly cheap part and if it fixes the issue then you'll be one happy chap and if it doesn't then atleast you've tried and not had any great expense (yet!).

Neillyboy78 · Nov 15th, 2011, 20:34

Aye sorry a meant to say the a changed the coolant temp sensor CTS,wee sensor above the thermostat housing....it did fix it for a few day's but it's now back to it's old self.The sensor was a non genuine one from PartsforVolvo??

Neillyboy78 · Dec 7th, 2011, 11:02

Quote:

Originally Posted by Neillyboy78

Aye sorry a meant to say the a changed the coolant temp sensor CTS,wee sensor above the thermostat housing....it did fix it for a few day's but it's now back to it's old self.The sensor was a non genuine one from PartsforVolvo??

Just if anyone has the same symptoms.....A new MAF sensor cured the problem for me,running sweet now!!

LHV40T · Dec 8th, 2011, 06:54

Try cleaning the Idle Control Valve which is a very easy job and if it has not been cleaned for a couple of years will need doing anyway. Use spray pack carby cleaner.
Don't forget to report back with any successes.

Nov 14th, 2011, 20:26	#1
Neillyboy78 Senior Member Last Online: Aug 15th, 2013 22:30 Join Date: Jan 2011 Location: Fife	2001 T4 wont run when cold...help!! I have owned a 2001 V40 T4 since July and 9 times out of 10 say it wont idle on a cold start.I have changed plugs which did'nt work....then i changed the CTS which seemed to work for a few days but is now worse than ever..My local garage said the problem could be due to blowing exhaust/cracked manifold which you can hear leaking from cold upsetting the mixture....Could this be the case?Anyone had simular problems?

Nov 15th, 2011, 20:34	#4
Neillyboy78 Senior Member Last Online: Aug 15th, 2013 22:30 Join Date: Jan 2011 Location: Fife	Aye sorry a meant to say the a changed the coolant temp sensor CTS,wee sensor above the thermostat housing....it did fix it for a few day's but it's now back to it's old self.The sensor was a non genuine one from PartsforVolvo?? Last edited by Neillyboy78; Nov 15th, 2011 at 20:39.

Nov 15th, 2011, 18:29	#3
SonyVaio VOC Member Last Online: Feb 26th, 2016 19:58 Join Date: Aug 2011 Location: Exmouth	As 960 says I'd start with the engine temp sensor (960kg is usually not far off the mark). This should be a fairly cheap part and if it fixes the issue then you'll be one happy chap and if it doesn't then atleast you've tried and not had any great expense (yet!).

Dec 8th, 2011, 06:54	#6
LHV40T Junior Member Last Online: Nov 1st, 2016 00:02 Join Date: Apr 2009 Location: Sydney	Try cleaning the Idle Control Valve which is a very easy job and if it has not been cleaned for a couple of years will need doing anyway. Use spray pack carby cleaner. Don't forget to report back with any successes.

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