Ok, so I just got done changing my timing belt, balance belt, and alternator belt (which are all aligned correctly) and I have a problem. I went and tried to start the car. And it turns over very weakly (a lot weaker than it did before the belt change). I was turning it over for around 1-3 seconds and I've heard my exhaust backfire. Now, I don't really want to try and see if it starts up since I'm affraid I'll mess something up . I also cleaned my lifters prior to the belt change, but I doubt this has anything to do with the problem. plz help me out guys if you know what could be wrong . 