JCW stuttering..

[Burple]

Mornings!

Just a quick question to see if anybody can shed some light..

I've noticed this happening a few times on a particular bit of road, so I thought I was just losing traction, but I tested it this morning and I think something might be up..
So when I accelerate reasonably hard (not foot to the floor) and the car gets to just about 4.5k revs, it stutters briefly. I tried it a couple of times to test this morning, and it happens every time in 3rd and 4th. feels like the traction control is coming on, or misfiring.
Any quick ideas as to what it might be? Could it be a dirty air filter? maybe a dodgy plug? Didn't have time to check the filter this morning, but I'd be surprised if it was that, it runs perfectly well the rest of the time, and the stutter seems to go at higher revs...
Could it be something more expensive?

Cheers!

[MINI William]

Mornings!

Just a quick question to see if anybody can shed some light..

I've noticed this happening a few times on a particular bit of road, so I thought I was just losing traction, but I tested it this morning and I think something might be up..
So when I accelerate reasonably hard (not foot to the floor) and the car gets to just about 4.5k revs, it stutters briefly. I tried it a couple of times to test this morning, and it happens every time in 3rd and 4th. feels like the traction control is coming on, or misfiring.
Any quick ideas as to what it might be? Could it be a dirty air filter? maybe a dodgy plug? Didn't have time to check the filter this morning, but I'd be surprised if it was that, it runs perfectly well the rest of the time, and the stutter seems to go at higher revs...
Could it be something more expensive?

Cheers!

N14 or N18 as it could be the ever so common coking issue

[Burple]

N14 or N18 as it could be the ever so common coking issue

14... I was hoping it wouldn't be that cos it gets a good run every day, it doesn't do 'round town' pootling about that often.
Is that known to just affect a certain rev range? I though it made the car sluggish all round..
I'll maybe pull a plug at the weekend if I get a chance and have a look. Are there any places around that do reasonably priced decoke/ walnut blast?

Cheers!

[badwolf340]

Douglas from B&M (one of NMS sponsors) carrys out de coke and most other MINI related work

[EcosseGP]

I think like the others have mentioned it's maybe a de coke that's required ... How many miles has it done ?


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[MINI William]

As above Ewan, B&M do a decoke. I know Andrew has used them before for other bitd and bobs and has always rated them

[Burple]

Might have to look into that then :( car's done 48k now so pribably about time to be fair.

Cheers!

[MrMischief]

Ewan, if it's not the decoke issue, it sounds like it's stuttering as it comes on boost at 4.5k.
When was the fuel filter last changed, could be starvation...any pinking/retarded timing - does it feel sluggish?
Get it checked for error codes?

[Burple]

Ewan, if it's not the decoke issue, it sounds like it's stuttering as it comes on boost at 4.5k.
When was the fuel filter last changed, could be starvation...any pinking/retarded timing - does it feel sluggish?
Get it checked for error codes?

Weirdly enough.. it didn't do it on the way home tonight. As far as I know the fuel filter has never been changed, unless that's done as part of a service. It doesnt feel particularly sluggish, and this has only happened a few times.. and only at that rev range.. so I was doubting the coking issue especially because it gets a good spirited run most days. I gonna check the air filter tomorrow as a start. Probably should get a code reader too is it easy to change the fuel filter? Never tried makes sense that it could be the filter tho..

[MrMischief]

I've never looked at the filter on the JCW yet, so look forward to hearing if it's an awkward bugger Most are normally just inline...just depends on their location as to how easy the job is!