BUICK RENDEZVOUS WONT START AFTER A FILL UP

Question

HELP, MY DEALER DOESN'T KNOW. I BOUGHT A RENDEZVOUS

06 WITH 3.6L. RUNS GREAT UNLESS YOU OPEN FUEL CAP AND PUT 5-10 GALS IN IT. GET IN TO CRANK AND IT JUST TURNS OVER, YOU MUST PUT THE GAS PEDAL TO THE FLOOR IN ORDER TO CRANK IT. IT THEN IDLES ROUGH UNTIL ALL THE GAS IS BURNED OUT. HERE IS WHAT THE DEALER REPLACED...UGH..OK HERE IT GOES. VAC CANISTER, FUEL LEVEL SENSOR, GAS TANK, CHECK VALVE, WIRING HARNESS TO FUEL SYSTEM, PCM, COUPLE OF SOLENOIDS, GAS CAP, SURE I AM FORGETTING SOMETHING. BUT IF YOU GOT ANY SUGGESTIONS FOR MY ASE MECHANIC LET ME KNOW. EXTENDED WARRANTY PEOPLE WILL APPRECIATE IT TOO.

Answer 1

I am having the same issue with my 06 Rend. My mechanic can't find the problem either, as it always starts up when I get it to the mechanic. Did you try the other solutions? Curious to see if it worked,

Answer 2

get a new mechanic wtf slap him you replaced so many things that wouldn't go bad... this guy is taking you for a ride or he doesn't know what he is doing... check your fuel pressure regulator or your air sensor

Answer 3

take tank out and check for water or diesel n tank  ..then check float for being filled with liquid.