If this is just in the current damp conditions, it sounds like your Traction Control is cutting power until you get grip ...
Mine does this, and quite often the TC/ESP light doesn't flash even though the power is definately being reduced ...
In the dry I get strong boost from around 2000rpm, it peaks at about 3500rpm, drops a bit then comes again around 4500-5500...
I think all ST's are slightly different though, but not getting any proper boost til 4000rpm does seem pretty strange ...
Mine does this, and quite often the TC/ESP light doesn't flash even though the power is definately being reduced ...

In the dry I get strong boost from around 2000rpm, it peaks at about 3500rpm, drops a bit then comes again around 4500-5500...

I think all ST's are slightly different though, but not getting any proper boost til 4000rpm does seem pretty strange ...
