Originally Posted by vzdude

Sounds like maybe a crank sensor, or cam sensor. I know you checked for codes, do you have a scanner or something to be able to read the data stream? If so, look at the cam and crank signal. Make sure they are both reading when it won't start.There is also a synch state. It should say cam/crank if they are o.k. The crank sensor is kinda likely. I've seen them do the same thing. The cam sensor should only show a light when it goes bad. It is used basically to get the engine going - shows computer when #1 is at TDC. The crank sensor should do the same thing by the different spacing on the tone ring. It just takes more revolutions to get teh engine to start using crank sensor only. Thats why they put the cam sensor in , to get the engine started quicker. So to make this long story shorter, next thing I would replace would be the crank sensor. You might save some money though by having it diagnosed by someone with a scanner. Would have saved the fuel pump money at least.