Quote:
Originally Posted by redpoint5
Curious how Cummins is liable since they just make motors? It's up to the manufacturers to put all the pieces together and not develop test defeat strategies.
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Light duty - yes - but these are all over 14,000 lbs with different rules.
"US and California regulations do not require that complete heavy-duty diesel vehicles be chassis certified, instead requiring certification of their engines (as an option, complete heavy-duty diesel vehicles under 14,000 lbs can be chassis certified). Consequently, the basic standards are expressed in g/bhp·hr and require emission testing over the FTP engine dynamometer cycle"
From: Diesel Net which has everything you would ever want to know about emissions.
This is the tip of the iceberg. If Cummins was cheating on 6.7L engines installed in Ram products no doubt they were cheating on 6.7L engines installed in other products like school busses, step vans, and box trucks.