G35 2004 coupe, cranks but won't start, after a couple tries it starts , new battery, new throttle body, new crankshaft position sensor, and took it to dealer and the erased all codes and re-programed the computer, and rps, only o2 sensors pre-cats were bad and 3 alarm codes. Left dealer csr started fine the next day , problem started again..

I took of the hose that goes from engine to intake, it helped sometimes to start it... car completely stock..

Am about to go crazy ... any help I would apreciate so much .. Carlos