Tuesday, August 28, 2007
A typical road test in a Thomas School Bus, this unit has a Cummins ISB Model [electronic] Diesel Engine and when roadtesting it's always best to find a good grade to find any faults with performance.
Sometimes the transmission has to be considered if it's shifting poorly. If you're climbing a hill and the trans. upshifts too soon you'll start lugging the engine which feels like an engine power problem.