[s-cars] Lazy start condition

[Aaron]

Hi all
 From time to time my car is difficult to start (requires 6+ revolutions)
Othertimes - starts in 3 or so.
No throttle applied.
72K mi with all factory services done.
I recently installed new cam position sensor due to intermittent no
start condition.
Im wondering if I should change the O2 sensor and perhaps plugs.  But
perhaps these were done during the 60K service. Im not sure.
Any ideas.
Thanks