djxib wrote:
So you definitely seem down on power under 2000rpm? You should be able to light up the tires at will at low speeds.

Can you describe the problem at little more? For example, what speed/gear you are testing at - can you burn the tires at a stop light? What happens when you jab the throttle - does the car pause as if it's thinking what to do next (dead spot - too lean), or does it stumble along slowly, maybe with some herky-jerky and black smoke? (too rich).

Is there any knock/spark retard?

You said you have PE disabled, why is that?

Do you have a wideband?

Need info!