ogarcia
I have a 2005 National Transmark RE with a Cummins Engine converted to CNG,. 170,000 miles.
There has always been an issue with the spark plugs failing too soon. Recently, a failed piston was diagnosed after taking the bus in for service.
Is this common with these buses.
There has always been an issue with the spark plugs failing too soon. Recently, a failed piston was diagnosed after taking the bus in for service.
Is this common with these buses.