FiTech EFI Tuning Forum MenuForum NavigationForumMembersActivityLoginRegisterForum breadcrumbs - You are here:ForumPost History: grnmachine70Please Login or Register to create posts and topics.Post History: grnmachine70grnmachine70UserProfilePost HistoryIm having a issue after 4 years of running great. Ive got the 2x4 1200 with power adder on a 671 468 …In: Rear 4 spark plugs gas soaked3 years ago