Hi guys, if I accelerate from low RPM, foot hard down through 4th (or 5th), about 5000rpm the engine cuts out briefly and the engine warning light comes on. If I accelerate flat out through the gears, i.e hard in second, third and fourth, (I'm going very very quickly), but there is no cut and everything works fine. It'd cuts out with a big jolt, enough to upset the direction the car is travelling in...
After 4 or 5 engine restarts the light goes off and all is well. Oddly, while the light is ON, the car sometimes seems to run better. Not sure why, or how, but just better.
I know internet diagnosis is nigh-on impossible, but does anybody have an idea of what may be causing this, or anything I can check? I have a feeling it may be boost related, something to do with the wastegate solenoid maybe? It's almost as though if the turbo is working really hard from low rpm it upsets something, but if the revs are already high (and presumably the boost has dropped off a bit?) then all is well.
Thanks for reading my ramblings and cheers for any advice that may be forthcoming.
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