The car will run fine for 7 - 10 days in row and then stall while driving. A couple of chugs and stall. Will not start for 2 minutes and then off I go for another 7 - 10 days. I've replaced the fuel filter and lines, fuel pump, water pump (serpentine belt while I was at it) and battery. EGR looks good (according to Saturn tech) and the TB is nice and clean. My Saturn tech and I are out of ideas. He ran it for 4 hours and it did not stall. No codes. Any suggestions?? TIA