Full Throttle Hesitation 3000rpm
 

Sounds like the the lambda sensor is faulty.

banny

MAF sensor is more likely, and a slow lambda may be also contributing. A specialist should be able to tell you one way or the other for both sensors.

Assume it is the MAF and keep it off boost till you get it checked properly!!

A faulty MAF causes fueling issues that can eaily kill your engine.

Ns04

Thanks
 

Thanks, swapped the Mass Flow Sensor with a second-hand spare and now, MUCH better, but not perfect, could it be that this one is still a bit dodgy or could it be that I need new HT leads?

check for clog fuel filters

You say the car is better now but not perfect, did you do an ECU reset after fitting the different MAF?

Another thing to think about, Do you have a DV fitted? when on light throttle what do you hear? does everything sound normal?

The reason I ask is I had exactly this problem and turned out to be the DV sticking open and leaking all the boost pressure, I sent it back and ended up with a new one now the car runs perfect.

I have had this symptom for a while (99MY) just at lower speeds (my hairdryer coming on boost at 1800), got very bad last night in the wet, pulled HT leads and they are FUBAR (track marks all over them - cheap non OE fitted by last owner), OE leads are £50.15+VAT list price from the dealer but you may get a discount.

Simon