MINI2

MadUsa1 · Dec 12th, 2007, 10:25 PM

I just picked up my car after having the JCW 210 kit fitted.

It's awesome - great noise, big power and lovely delivery.

However, after a long motorway drive, the engine began to hesitate slightly when I floored it from low revs, anyone else experienced this?

It's just a slight stutter, as if something's not right with the tuning or something, is this a normal early conversion gremlin?

A quic search suggests it might be the crank case breather hose - could this cause the stuttering I'm experiencing?

cheers,

Jake

Ant FR · Dec 13th, 2007, 08:38 AM

turn round, back to the dealer, and leave ti with them, After all that money you just spent the least they can do is sort it for you

MadUsa1 · Dec 13th, 2007, 08:56 AM

fair point, however I'd like to get a bit more information before I take it in so I can tell the dealer exactly what to look for.

Has anyone else had a similar problem?

GT4 Baz · Dec 13th, 2007, 09:24 AM

The pressure in the crank case will be higher when running more boost so it could be a blocked crank case breather.

If the oil vapour cannot escape from the crank case you will end up burning it in the combustion chamber intead. This has the effect of reducing octane and increase the chance of detonation. It could make the car feel stuttery I guess.

Did they change the plugs as a part of the upgrade too?

MadUsa1 · Dec 13th, 2007, 09:29 AM

cheers for the info Baz, I think it could be the breather as the stuttering is often accompanied by pops from the exhaust.

is it still safe to drive if this is the case?

if it is the crankcase breather pipe, do I need to replace the pipe or just un-block it? Does anyone have a picture of this pipe or a part number for it? (I have to explain it to the garage in Zurich, where they only speak German!)

yes, they did change the plugs as part of the conversion, so I don't think it's a spark problem.

humph · Dec 13th, 2007, 10:55 AM

A friend has recently had a stumbling problem with their 210 JCW. The scenario was when sitting at 60 or so (about 2700 rpm), then flooring it the car would "stumble" at about 3000rpm. This would happen in any gear. I describe it as a stumble as it felt like a misfire and the car felt as though something had tugged it backwards sharply. It was sometimes very obvious, others a bit more subtle, but always there. A new supercharger valve seems to have sorted it. I will add that this car had just had new plugs/leads but these did not solve the problem in this case.

MadUsa1 · Dec 19th, 2007, 10:46 PM

Hi all, took the car back to BMW yesterday. Quick ten minute drive with the mechanic was enough for him to conclude it was the spark plugs.

Got the spark plugs changed under guarantee and sure enough, no more stuttering.

Surprising, since the JCW 210 kit comes with new spark plugs - either they weren't changed, they were changed but broke soon after, or they were changed but just happened to be faulty.

Either way the car's now running perfectly, just in time for a trackday on friday

Dec 12th, 2007, 10:25 PM	#1
MadUsa1 MINI2 Regular My Classifieds Join Date: Oct 2007 Local Time: 11:03 PM Posts: 83 Offline	JCW 210 stuttering I just picked up my car after having the JCW 210 kit fitted. It's awesome - great noise, big power and lovely delivery. However, after a long motorway drive, the engine began to hesitate slightly when I floored it from low revs, anyone else experienced this? It's just a slight stutter, as if something's not right with the tuning or something, is this a normal early conversion gremlin? A quic search suggests it might be the crank case breather hose - could this cause the stuttering I'm experiencing? cheers, Jake Last edited by MINIAC : Dec 12th, 2007 at 11:41 PM.

Dec 13th, 2007, 09:29 AM	#5 (permalink)
MadUsa1 MINI2 Regular My Classifieds Join Date: Oct 2007 Local Time: 11:03 PM Posts: 83 Offline	cheers for the info Baz, I think it could be the breather as the stuttering is often accompanied by pops from the exhaust. is it still safe to drive if this is the case? if it is the crankcase breather pipe, do I need to replace the pipe or just un-block it? Does anyone have a picture of this pipe or a part number for it? (I have to explain it to the garage in Zurich, where they only speak German!) yes, they did change the plugs as part of the conversion, so I don't think it's a spark problem. Last edited by MadUsa1 : Dec 13th, 2007 at 09:35 AM. Reason: part number

Dec 13th, 2007, 10:55 AM	#6 (permalink)
humph Back To My Old Self Join Date: Jun 2006 Location: In The Wind Local Time: 09:03 PM Posts: 2,717 Offline	A friend has recently had a stumbling problem with their 210 JCW. The scenario was when sitting at 60 or so (about 2700 rpm), then flooring it the car would "stumble" at about 3000rpm. This would happen in any gear. I describe it as a stumble as it felt like a misfire and the car felt as though something had tugged it backwards sharply. It was sometimes very obvious, others a bit more subtle, but always there. A new supercharger valve seems to have sorted it. I will add that this car had just had new plugs/leads but these did not solve the problem in this case. MODERN MINI OSCARS 2008 - BEST COOPER NOMINEE

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Dec 13th, 2007, 08:38 AM	#2 (permalink)
Ant FR MINI2 Master My Classifieds Join Date: Oct 2006 Local Time: 09:03 PM Posts: 1,922 Offline	turn round, back to the dealer, and leave ti with them, After all that money you just spent the least they can do is sort it for you

Dec 13th, 2007, 08:56 AM	#3 (permalink)
MadUsa1 MINI2 Regular My Classifieds Join Date: Oct 2007 Local Time: 11:03 PM Posts: 83 Offline	fair point, however I'd like to get a bit more information before I take it in so I can tell the dealer exactly what to look for. Has anyone else had a similar problem?

Dec 13th, 2007, 09:24 AM	#4 (permalink)
GT4 Baz MINI2 Newbie Join Date: Nov 2007 Local Time: 10:03 PM Posts: 24 Offline	The pressure in the crank case will be higher when running more boost so it could be a blocked crank case breather. If the oil vapour cannot escape from the crank case you will end up burning it in the combustion chamber intead. This has the effect of reducing octane and increase the chance of detonation. It could make the car feel stuttery I guess. Did they change the plugs as a part of the upgrade too?

Dec 19th, 2007, 10:46 PM	#7 (permalink)
MadUsa1 MINI2 Regular My Classifieds Join Date: Oct 2007 Local Time: 11:03 PM Posts: 83 Offline	Hi all, took the car back to BMW yesterday. Quick ten minute drive with the mechanic was enough for him to conclude it was the spark plugs. Got the spark plugs changed under guarantee and sure enough, no more stuttering. Surprising, since the JCW 210 kit comes with new spark plugs - either they weren't changed, they were changed but broke soon after, or they were changed but just happened to be faulty. Either way the car's now running perfectly, just in time for a trackday on friday

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