I decided to try get my car going. 2008 Pontiac grand prix 3.8 Liter. It was sitting for about 18 months. When we started it, it was obviously missing. Investigating further we found there was no spark on #1 an #4 cylinder. Bottom coil pack. After removing the coil pack I noticed it had a crack in it. So I purchased a new one. We put it on and still the same thing, no spark coming from the coil pack 1,4. I don't think the new coil pack could be bad too. Anybody have any ideas.