jjrowanExplorerApr 09, 2014Lacking PowerI purchased a 1998 Gulf Stream Sun Voyager today. It has a 5.9 liter Cummins Diesel with Allison 4 speed transmission. The test drive the owner took me on was about 20 miles, since I didn't drive I...Show More
YC_1NomadApr 09, 2014I agree on the service center check. You may not be getting the turbo boost you need due to something as simple as a leaky coupling hose. In any case I suspect it would not be a speed demon. I bet your mileage is good though,.
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