Yeah even at slow speeds it struggles to go smoothly up the range past 3 k ish and to give the boost although it is most definitely there. Up to 3 is spot on and also with no load free revving is fine. Last time i had a similar issue on another car it was to do with the way someone had removed the amal valve and re routed the pipework with a shit type of bleed valve. No bleed valves or controllers on this tho Agreed with the clutch mate for sure I really thought it was and I will change it but I'm sure it's gotta be something else. Would the wastegate valve cause anything similar if it broke or burnt away??