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My first RV experience was last night on the way home from the dealership. I purchased a 1992 Allegro Bay Diesel Pusher with a 230hp Cummins and 4spd Allison. About 15 miles southbound on I-35 the bus lost almost all power and the RPM's dropped from about 2200 to 1400. This limited top speed to right under 40mph. I took the first exit to see what was going on and when I let off the accelerator the bus stalled. I managed to steer it to the side of the road and stop without the engine running, and it started right back up. You could feel the turbo spool up until about 1800rpm's and then it would start dropping back down. Also I noticed that the longer we drove, the more the engine coolant temp. decreased. We would pull over, let it warm back up and take off again. Called the dealer and they told me to bring it back.... but I wonder what is wrong with it. Any ideas ?
