buick rendev

I have 2003 buick rendezvous some times starts with first cranck and some times it crancks but no start i replaced new battery and new fuel pump and it worked good for a week and start doing the same thing .any help please

thanx

If you haven't fixed your rend. already, check out my post entitled "weird starting issue". These suv's seem to be prone to excessive carbon build up in the throttle body. Pick up a can of Throttle body cleaner and clean it. I also recommend cleaning the Maf sensor as well. They sell a cleaner for that also, do not use the throttle body cleaner for that purpose. Hope it works!