Looking for some help. Recently purchased a ‘94 echelon that had been sitting for a few years. Working on redoing all th vinyl and hopefully getting the 5.7 EFI 350 tournament Ski back in shape. Engine starts, idles, revs fine just seems to cut out. I’m thinking it’s wiring issue but checking to see if anyone has any other suggestions before I take it in. Guy I bought it from had put in a ignition control module from his old Chevy. Any good service recommendations in the Rhode Island area? Thanks