1995 Mitsubishi Montero

Engine Mechanical problem
1995 Mitsubishi Montero Four Wheel Drive Manual 220, miles

Timing belt and exhaust manifold changed, and then when I was driving to work after 25 minutes the engine light came on, and then after 15 minutes when I was about to exit, it just stopped. I stayed for about ten minutes, started it and went to work and the check engine light didn't show up. Today I was driving again and stopped after 20 minutes, stayed there for about 7 minutes, started it again without fail. I'm wondering, what could be causing this stopping of the engine.
Joseph Babu
April 9, 2010.

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