This might not work for everyone, but it is worth a try. I have been recently having issues with my engine turning over and not starting. It is getting fuel and spark so that is all good and had the random thought to unhook the Throttle position sensor and all the sudden it worked! It happened again recently and I immediately unhooked this sensor and it started right up. So, just an FYI to everyone if you have this problem to give it a shot and see if it works for you.