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Old 11-02-2014, 08:40 AM
745 TurboGreasel 745 TurboGreasel is offline
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Join Date: Sep 2012
Location: Freedom CA
Vehicle: 85 745, 84Suburban 96Ram
Posts: 509
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The time does sound about right for a thermostat in 'shut' mode.

What happens if you idle instead of driving?

Any chance there is gasoline in the tank? that will run worse and worse before stopping.
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