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This problem started origionally driving to work I tried to leave early one day and would not start.  Once car cooled down It would.  I started to test the vehicle, placed a fuel pressure gauge and checked spark when it did not ran. With that I ruled out fuel pressure, Spark is the problem, I replaced the coil pack and the problem still remains.  This problem is also heat related. It will start if i run to the store and back (2-3m) If i go long distances such as work (25m) it will consistantly not start for 4-6 hours (till it cools off) then it starts with no problem, but will continue once it warms again. Any suggestions???