hey guys.. so took the mini out and was driving around when suddenly it started jerking and spluttering like its about to die.. so i stopped and figured maybe fuel mixture was to lean so richened it but nothing happened.. when i free rev it theres no issues but when i put it in gear i can't get it past 2500 rpm and if its going uphill then its really bad.. im fighting to keep the engine alive..
its a 998 clubman with stage 1.. even if i drop the gears it makes no difference.. and the engine is making a pop pop pop sound almost like a misfire but not.. just running very rough.. any ideas guys?
thanks