Hi There Fitted Prv car drives mint 1st and 2nd gear but struggles to pass 3000 rpm in 3rd with exhaust popping ! have i got boost set to high or is the car running lean
Weird, I have exactly the same thing. It's probably your coil packs or spark plugs. They are under greater pressure on boost, making the problem worse. Try getting a second hand coild and trying it on each cylinder, and if that doesn't work, replace the plugs.