my00 uk car slightly lumpy at idle hesitant at early boost
checked lamdba reading and sat on 1.028 which is just under limit went over and came back again just ok for mot co 0.01 hc 0001 does this suggest lambda is getting faulty or maf playing around

 

check the voltage with the engine ticking over, if its sat at a voltage and not fluctuating then yes its knackered.