Outer Limits 4x4 Board

I have a tb45 in my gq its been running fine for months. Just the other days starts idiling rough feels like its missing, general lack of power and stinks of fuel. after playing with the leads it seemed to come good again so i figured leads and or plugs shot. replaced both. ran great for 2 days then i get exactly the same thing. Ive just pulled the dizzy cap off and the rotor button and the lead contacts both look farily worn. Can anyone post pics of theirs so i can compare? or has anyone else experinced this? Or any ideas of what else to check?
Cheers