My Saturn always starts when hitting the key. I normally drive it on a daily basis, but it sat for several days as I drove my Explorer. The other day I went to start it, it will turn over strongly, but won't start. You can smell gas after several tries, so fuel pump is working. It seems it is not firing, what is the most likely cause? I have never had an issue except starter and battery, both are under one year old. Thank you so much for any advice.