i bought two power cores from nology for my 2002 2.2 liter engine non eco tech...i dont have them on yet cause the nology guy said he has to get the proper installation so i wont screw up anything when i finally get them on....well i tired of waitin on him...any one have a 2002 cavalier 2.2 non eco engine and can tell me how to install these step by step...thanx for answerin both questions