Im kinda going through the same promblem. Well about 2 weeks ago i went to go start my car and it wouldnt start so i thougth maybe it needed new plugs and wires cause they seemed kinda old so i replaced them and still wouldnt start, so i checked the fuel rail and there was no fuel pressure to the rail and i didnt hear the fuel pump turn on so at first i checked the fuse and the fuse was good so i ended up switching the realys around the fuel pump and the the fuel pump speed control then i turn the kee then heard the fuel pump turn on and the car started. then the same thing happens if the car sits for a few hours but sometimes it takes few times switching the relays around for the pump to get power. Then one night I was on the highway I could feel my car bogging then it died everything was still working just the engine just shut off, pulled over then turned the key off and on a few times then turned it over it started up i gave it some gas then it quit again so then i got out pulled the relays switched them than bam fired up drove back home with out any promblems. Should I get a PCM tune? Fuel pump? or whatever someone help.
