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Chat Area => General Car Chat => Topic started by: Sir Tigger KC on 15 December 2023, 18:56:10

Title: Mondeo Running Rough
Post by: Sir Tigger KC on 15 December 2023, 18:56:10
2008 Ford Mondeo 2.2TDCi Titanium X 165,000 miles

Starts fine, but running as rough as a badgers when cold. Lumpy idle and very spluttery when I floor it.  OK when it's warmed up, although still idles slightly rough.

No malfunction messages and haven't put the code reader on it yet, but I'm thinking it might be an injector issue?  ???

Any thoughts? TIA!  :)
Title: Re: Mondeo Running Rough
Post by: TheBoy on 15 December 2023, 19:14:22
The fact it dramatically improves when warmed, always start with the glow plugs - easy to check, and easy, cheap option.
Title: Re: Mondeo Running Rough
Post by: TheBoy on 15 December 2023, 19:15:01
Beyond that, code reader, ideally with live data around air temp and coolant temp.
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 15 December 2023, 19:45:25
The fact it dramatically improves when warmed, always start with the glow plugs - easy to check, and easy, cheap option.

Hmm yes didn't think about the glow plugs as I fitted a new set about 5 or 6 years/50,000 miles ago and it starts OK.  :-\
Title: Re: Mondeo Running Rough
Post by: Raeturbo on 15 December 2023, 20:12:01
Glow plugs are not going to help once the engine is running, try using some proper diesel especially in winter like shell v power👍
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 15 December 2023, 20:14:45
Glow plugs are not going to help once the engine is running, try using some proper diesel especially in winter like shell v power👍

You mean Costco's finest isn't proper diesel?  ???   ;D
Title: Re: Mondeo Running Rough
Post by: Raeturbo on 15 December 2023, 20:47:36
You know it’s not, and if it’s easy enough test if there’s water in the system, often the easiest things are overlooked 👍
Title: Re: Mondeo Running Rough
Post by: Nick W on 15 December 2023, 22:36:00
A rough running TDCi Mondeo :o ? I hope your wallet is full. Likely causes are injectors, fuel pump, turbo or internal engine faults due to not fixing the previous problems. And if it's a bit slow to start then the flywheel is failing, which can also make them run badly.
Title: Re: Mondeo Running Rough
Post by: Viral_Jim on 15 December 2023, 23:12:53
A rough running TDCi Mondeo :o ? I hope your wallet is full. Likely causes are injectors, fuel pump, turbo or internal engine faults due to not fixing the previous problems. And if it's a bit slow to start then the flywheel is failing, which can also make them run badly.

Well aren't you a ray of sunshine this evening!  ;)
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 15 December 2023, 23:49:45
A rough running TDCi Mondeo :o ? I hope your wallet is full. Likely causes are injectors, fuel pump, turbo or internal engine faults due to not fixing the previous problems. And if it's a bit slow to start then the flywheel is failing, which can also make them run badly.

Well aren't you a ray of sunshine this evening!  ;)

 ;D
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 15 December 2023, 23:52:36
I've got a bottle of Redex somewhere. That'll sort it!  :y  ;D
Title: Re: Mondeo Running Rough
Post by: Raeturbo on 15 December 2023, 23:55:23
Reddy Christmas  ;D
Title: Re: Mondeo Running Rough
Post by: Doctor Gollum on 16 December 2023, 00:36:04
I've got a bottle of Redex somewhere. That'll sort it!  :y  ;D
It might help with the flywheel rattle, but I suspect the clutch might not appreciate it
Title: Re: Mondeo Running Rough
Post by: countrywoman on 16 December 2023, 09:35:26
Well it is a Transit engine so what do you expect!!
Title: Re: Mondeo Running Rough
Post by: TheBoy on 16 December 2023, 10:25:47
Glow plugs are not going to help once the engine is running
Sorry, Rae, I'm gonna have to cry BS to that.  That era Mundano is common rail, so glow plugs are arguably more important once started than they are in the starting process, particularly in current UK temps.


But, yes, I am more suspicious of injectors on that car, but the glows are an easy first check, and you could be lucky - it's Christmas after all! ;D
Title: Re: Mondeo Running Rough
Post by: Field Marshal Dr. Opti on 16 December 2023, 12:16:14
Any luck with getting the Titty X sorted, Tig?
Title: Re: Mondeo Running Rough
Post by: Raeturbo on 16 December 2023, 12:21:17
Glow plugs are not going to help once the engine is running
Sorry, Rae, I'm gonna have to cry BS to that.  That era Mundano is common rail, so glow plugs are arguably more important once started than they are in the starting process, particularly in current UK temps.


But, yes, I am more suspicious of injectors on that car, but the glows are an easy first check, and you could be lucky - it's Christmas after all! ;D
                 Fair enough :) too modern for me then ;D
Title: Re: Mondeo Running Rough
Post by: Viral_Jim on 16 December 2023, 15:47:01
, so glow plugs are arguably more important once started than they are in the starting process, particularly in current UK temps.

So do the glow plugs stay on once the engine is running? I thought they were purely there to get things warm and aid starting?

Shows what I know!
Title: Re: Mondeo Running Rough
Post by: Doctor Gollum on 16 December 2023, 15:58:56
Presumably the finer injection tolerance requires a post start warm up to ensure a cleaner burn... Aka emissions wank  :-\

As opposed to the traditional let it smoke until it's warmed through  approach.
Title: Re: Mondeo Running Rough
Post by: TheBoy on 16 December 2023, 16:18:17
, so glow plugs are arguably more important once started than they are in the starting process, particularly in current UK temps.

So do the glow plugs stay on once the engine is running? I thought they were purely there to get things warm and aid starting?

Shows what I know!
In the UK, a common rail diesel doesn't really need glow plugs at all, but does reduce cranking times in very cold temps (well, UK idea of very cold), and improves idle and emissions after its started.

Yes, glows stay on after cranking has finished.  There tends to be 3 stages of glow plug control on modern diesels, pre cranking Iif required), cranking (if engine cold) and post cranking (usually a complex algorithm based on fuelling and temps).
Title: Re: Mondeo Running Rough
Post by: Nick W on 16 December 2023, 17:35:59
You missed the fourth stage: not working properly and causing expensive faults ;D
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 16 December 2023, 18:16:18
Any luck with getting the Titty X sorted, Tig?

Seems to have sorted itself out M'Lud.  :y

It started and ran fine today.   :)

I wonder if the Italian tune up it got yesterday helped?  ;D

Title: Re: Mondeo Running Rough
Post by: Field Marshal Dr. Opti on 16 December 2023, 18:54:35
Any luck with getting the Titty X sorted, Tig?

Seems to have sorted itself out M'Lud.  :y

It started and ran fine today.   :)

I wonder if the Italian tune up it got yesterday helped?  ;D

Good news.....and you didn't have to dirty your donnies or empty your wallet. :y
Title: Re: Mondeo Running Rough
Post by: Kevin Wood on 16 December 2023, 22:29:02
You missed the fourth stage: not working properly and causing expensive faults ;D

.. and the fifth stage: "sheared off in the cylinder head". ;)
Title: Re: Mondeo Running Rough
Post by: Sir Tigger KC on 16 December 2023, 23:23:19
Christ you fellas are full of joy!  ::)  ;D
Title: Re: Mondeo Running Rough
Post by: Raeturbo on 16 December 2023, 23:27:36
You missed the fourth stage: not working properly and causing expensive faults ;D

.. and the fifth stage: "sheared off in the cylinder head". ;)
               That’s why I’ve coupled another battery to my master van to help start it when it’s really cold. I will never try to change the glow plugs in that as I just know they will snap👍
Title: Re: Mondeo Running Rough
Post by: TheBoy on 17 December 2023, 12:50:37
You missed the fourth stage: not working properly and causing expensive faults ;D

.. and the fifth stage: "sheared off in the cylinder head". ;)
Now that's a story I know well ;D