Running short errands - 5 + miles. Park, turn off engine. Come back within just a few minutes, car won't start. All other electrics (gauges, radio, etc.) are okay. I wait, fuming, for a few minutes, then car starts. When problem first occurred I replaced the starter and solenoid. $250 later, same problem. If the errand takes longer than say, 10 minutes, car starts fine. Should starting be a constant adventure? Any thoughts appreciated.