Hi all,
I hope you can help me, my car has had this problem for some time. I took it to Mini Nottingham (Sytner's) and they, ahem, 'diagnosed' deteriorating spark plugs which they duly replaced under warranty. Needless to say it didn't fix the problem. The car drove a bit better but the problem came back.
Symptoms:
Under full acceleration and at highish revs the engine stutters badly causing a dramatic loss of power, this is accompanied with loud metallic pinging noises for the duration of the stutter (detonation?) and smoke from the rear. I have not determined what colour as yet because it's more noticeable it the dark when illuminated by others' lights and of course all smoke looks similar in the sodium/halogen glare!
If you back off the revs it's fine and probably won't do it again until the next day, for example. It seems to happen just once a day and the first time I boot it; usually when in second or third gear. It won't happen if I am tootling along in fourth or fifth - it's almost as if I need to take it by surprise with a sudden & quick increase in revs.
In addition to this the car and probably unrelated as this is more recent, the car's coolant has turned a murky grey/black colour - no smell of fuel or combustion gases though.
Any ideas?
Hope someone can help!!
Paul
I hope you can help me, my car has had this problem for some time. I took it to Mini Nottingham (Sytner's) and they, ahem, 'diagnosed' deteriorating spark plugs which they duly replaced under warranty. Needless to say it didn't fix the problem. The car drove a bit better but the problem came back.
Symptoms:
Under full acceleration and at highish revs the engine stutters badly causing a dramatic loss of power, this is accompanied with loud metallic pinging noises for the duration of the stutter (detonation?) and smoke from the rear. I have not determined what colour as yet because it's more noticeable it the dark when illuminated by others' lights and of course all smoke looks similar in the sodium/halogen glare!
If you back off the revs it's fine and probably won't do it again until the next day, for example. It seems to happen just once a day and the first time I boot it; usually when in second or third gear. It won't happen if I am tootling along in fourth or fifth - it's almost as if I need to take it by surprise with a sudden & quick increase in revs.
In addition to this the car and probably unrelated as this is more recent, the car's coolant has turned a murky grey/black colour - no smell of fuel or combustion gases though.
Any ideas?
Hope someone can help!!
Paul