Does anyone know the procedure for adjusting the TPS so that I can get a bit more fuel flowing when I come off the accelerator? Atm it seems to slam the supply off and the car lurches like someone jumped on the brakes.

I have the manual and the procedure for testing the TPS and mine appears to me normal, but it's driving pretty rough. A mechanic told me it was possible to tweak the TPS within its normal range to let some more fuel through.