Engine Mechanical problem
2006 Buick Rendezvous 6 cyl All Wheel Drive Automatic 84000 miles

hi check engine light is on car is fine except when get gas it starts hard sometimes 2 or 3 minutes, only after filling with fuel. replaced gas cap today any ideas. was told maybe relay? or sensor in fuel sending unit. thanks al

CEL On-Get the computer scanned for OBD2 code/s there's a problem within the engine management system to find out it must be scanned and comeback with the readings-also have the fuel pressure checked to rule out fuel filter/regulator/fuel pump-