1998 holiday rambler cummins 275 isb diesel pusher. started to lose power goin down the road. truck driver behind says you are really smokin back here! let off and it stops smokin and gains power up to a certain point,half way down on foot feed its alwright,anymore and it starts to lose power and smoke. call son which is comin from las vegas in his semi, imheadin to lv so we meet in mcgill and we change the filters ALLWAYS WITH A DIESEL CARRY EXTRA FUEL AND OIL FILTERS AND IF YOU CAN GET AN EXTRA GOVENOR FOR YOUR AIR COMPRESSOR BETTER YET. ANYWAY TOW A TRAILER FULL OF TOOLS,EXTRA ENGINE,no just kiddin but it shore helps