I have a 2001 Pontiac Aztek. About 2 weeks ago I started having trouble starting it. When I turn the key I can hear the starter rolling but the engine doesnt start. If I try starting it a few more times it almost always will start. At first it was just after it had sat overnight, but now it is almost every time I start it. I replaced the starter and battery all of a week ago. It still does it. I have tried giving it gas while trying to start it. Sometimes if I turn the key to the on position and leave it sit a few seconds before trying to start it it will start right up, but this has been working less the last few days. I know my fuel pump is working, so all I can think is possibly the fuel injectors or the fuel filter. A friend mentioned maybe the carburetor needed to be cleaned. I am hoping these will work but I am doubtful. Its just odd that it takes so many tries to start, even with full power.