CDTi Tourer Engine spluttering when idling (warm)

KISSY · 19th November 2015, 22:31

I'm noticing an engine splutter when idling at lights/junctions etc - the revs are not quite down at half under 1 - but it really judders and splutters (doesn't stall). Wondering what this could be? I notice it doesn't do it when the engine is cold - sits perfectly smoothly then - it's just when it's warmed up. This is a daily occurrence.

Any suggestions as to what it could be and a possible fix?

Many thanks.

wooly12345 · 20th November 2015, 20:37

I'm sure a fuel additive couldn't hurt, you can go as cheap as redex or as expensive as terraclean.

klarzy · 20th November 2015, 20:48

Maybe a crank or cam sensor on the edge of failure... warmth expands the engine block and the gaps increase a tiny amount...

would have thought just effecting starting with the crank sensor though

Mike Noc · 20th November 2015, 21:58

Won't be the cam sensor because as soon as the engine starts the ECM ignores it until the next start.

Kissy do the engine revs drop as you come to a stop and then recover or does the engine continue at the lower revs after the car has come to a stop?

If it is the former then nothing to worry about.

If the latter then maybe a sticky EGR valve? Worth giving it a clean out.

Phil-Hex · 20th November 2015, 22:08

Mine was doing that, sounded like it was on 2 cylinders at hot tickover, a couple of bottles of forte injection cleaner (one straight into the filter and left overnight) a good hard blast up the M6 and all seems well..... In fact going better than ever :-D

KISSY · 18th December 2015, 14:36

Quote:

Originally Posted by Mike Noc

Won't be the cam sensor because as soon as the engine starts the ECM ignores it until the next start.

Kissy do the engine revs drop as you come to a stop and then recover or does the engine continue at the lower revs after the car has come to a stop?

If it is the former then nothing to worry about.

If the latter then maybe a sticky EGR valve? Worth giving it a clean out.

I had the EGR by-pass done and to begin with it seemed it might have done the trick, but it hasn't...

The revs drop when I come to a stop and it just splutters whilst at the stop. All seems fine when I move off again. I did notice (before I had the EGR by-pass) that once when I was reversing, it seemed to drop the revs too much and it stalled, but it hasn't done that yet.

Perhaps the additive would be a good idea? I'm driving back to Spain in the car on Tuesday so I could pop some in and then it will get a good long drive!!

Sorry, but can you (or someone) please tell me exactly what I should be buying, only I don't know what I'd be looking for!!

Many thanks!

Mike Noc · 18th December 2015, 18:35

This was the one I used:

Advanced-Formula-Diesel-Treatment

They also sell this, which I haven't tried:

Diesel-Specialist-Injector-Cleaner

19th November 2015, 22:31	#1
KISSY Regular poster Rover 75 Tourer Join Date: Aug 2015 Location: West Wales Posts: 51 Thanks: 4 Thanked 5 Times in 2 Posts	CDTi Tourer Engine spluttering when idling (warm) I'm noticing an engine splutter when idling at lights/junctions etc - the revs are not quite down at half under 1 - but it really judders and splutters (doesn't stall). Wondering what this could be? I notice it doesn't do it when the engine is cold - sits perfectly smoothly then - it's just when it's warmed up. This is a daily occurrence. Any suggestions as to what it could be and a possible fix? Many thanks.

20th November 2015, 20:48	#3
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	Maybe a crank or cam sensor on the edge of failure... warmth expands the engine block and the gaps increase a tiny amount... would have thought just effecting starting with the crank sensor though __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

20th November 2015, 20:37	#2
wooly12345 Gets stuck in Rover 75 Join Date: Apr 2013 Location: Liverpool Posts: 610 Thanks: 98 Thanked 121 Times in 98 Posts	I'm sure a fuel additive couldn't hurt, you can go as cheap as redex or as expensive as terraclean.

20th November 2015, 21:58	#4
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,550 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Won't be the cam sensor because as soon as the engine starts the ECM ignores it until the next start. Kissy do the engine revs drop as you come to a stop and then recover or does the engine continue at the lower revs after the car has come to a stop? If it is the former then nothing to worry about. If the latter then maybe a sticky EGR valve? Worth giving it a clean out.

20th November 2015, 22:08	#5
Phil-Hex Gets stuck in Typhoon ZT-T CDTi Bittersweet 135 TF Join Date: Jul 2014 Location: Ribble Valley Posts: 672 Thanks: 226 Thanked 141 Times in 117 Posts	Mine was doing that, sounded like it was on 2 cylinders at hot tickover, a couple of bottles of forte injection cleaner (one straight into the filter and left overnight) a good hard blast up the M6 and all seems well..... In fact going better than ever :-D

18th December 2015, 18:35	#7
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,550 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	This was the one I used: Advanced-Formula-Diesel-Treatment They also sell this, which I haven't tried: Diesel-Specialist-Injector-Cleaner