Quote:
Originally Posted by Piotrsko
When I was training for schoolbus the lugging rule was: if it is floored and RPM doesn't increase, it's lugging. Other than that AFAIK there is no other way since they rattle and knock at all speeds. Might be able to tell if you're running an EGT because it will be close to 1300 degrees but EGT on schoolbusses is scary.
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Would EGT's indicate lugging? I thought lugging was bad for the bearing surfaces since there's not enough movement to get the engine parts to float over the oil.
I drove school bus too. I never heard that floored and no increase in RPM were indications of lugging. You'd have to be well below idle speed for that to happen on flat ground.
Not that I was easy on the school bus engines. One time I accidentally dumped the clutch at a stop and quickly stepped on the clutch again. The engine kept running, but as I tried to pull away the bus started backing up. I had changed the rotational direction of the engine and it was now running backwards!