2000 V8 Disco 2 Tuning

I have a 2000 V8 Disco 2 that has a low compression engine. Is tuning and the spark plugs different to a V8 without the low compression engine? All went wrong when I asked my local LR garage to change my suspension from air to springs and service the car. A major mistake! I am now back on air but the car has no real power and is not my Disco of old. I also have the ''three wise men'' come on intermittently but think this is a breakdown in one of the wires to the wheel sensor. I have had new coils fitted.

not really a problem with plugs although better quality help changing suspension shouldnt have ill effects most i see prefer ride once swapped to springs,either its a coincedence or theyve fitted some poor parts or made a mistake like fitting leads in wrong order