my buick has a hard time starting on 2006 Buick Rendezvous

whaen i go to start my buick it has hard time starting sometimes i even have to push on the gas to keep it running what can be wrong?

Asked by for the 2006 Buick Rendezvous
Do you have a Check engine Light on? That is the best way to deal with this problem. There could hundreds of reasons why your car is not running correctly.