4BTI black smoke under load.

Fritz Maurer

Well-known Member
In a 97 pc150 komatsu. It starts very well in cold weather. With 2 group1 twelve volts ,it sounded like it wasnt going to make it just now, but it took off right before the batteries gave up. At 18*F, can I rule out low compression as cause for black smoke? Thanks, Fritz
 
What is the intake manifold boost pressure when under load? Engine needs lots of air to burn clean, could be simple as air filters need replaced, or maybe you have a critter nest blocking air flow.
 

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