Welcome to JEEPZ.com . Have you done any diagnostics so far such as look for spark at the spark plugs and fuel pressure at the fuel rail ? I can go on with things to check but before getting deep into computer diagnostics , we'll need to know the simple things first. Spark and fuel is what runs the engine so we'll need to know that . If your close to an autozone or a parts store that can rent you a fuel,pressure gauge and you can get an in line spark tester you can get that far in diagnosing.