Hello all. Im new to this site. Just a quick history of the vehicle in question. I have a 2004 Isuzu Rodeo 3.5 direct injection 2WD with 155,000 miles on it. I have had it now for two years and for most of it I have been fighting the engine light. The code that keeps popping up is miss fire in cylinder 5. I have replaced all the plugs, cleaned the MAF sensor tested all the coils and have no indication of problem with these areas. I could be wrong, but am thinking that it might be injector O Rings. Because the engine light goes off for about a day or two and then comes back on. When I initially bought it. the shop replaced one of the injector O Rings. and it worked for about a few months and then the problem came back. Any advice is welcome.