I have a 2004 grand caravan with 3.8l v6 105000 miles. I took it to the shop for a check engine light and missfire. They replaced the coil pack and reprogramed the computer. When i went to pick up the miss was still there. Sure enough after 3 starts the check engine light came back on. Now they are trying to tell me that the bad coil pack made the injector go bad. To me this dosent sound possible. Looking for opinions.