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Doug_E_'s avatar
Doug_E_
Explorer
Mar 04, 2014

05 Monaco w/ 400 Cummins ISL low power /smoke.

Have been trying to find out what our engine problem is for awhile now. Cummins national and Cummins West in Fresno does not know what is causing the engine to have low boost and black smoke out the t...
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wolfe10's avatar
wolfe10
Explorer
Mar 05, 2014
Don,

He may or may not have an exhaust brake. The Cummins ISL could be ordered with EITHER an exhaust brake or (more expensive) compression brake (aka Jake brake).

And, if they suspect an electrical issue, first thing is to wire a voltmeter to the 12 VDC positive wire going to the engine ECM and see if voltage drops out when the problem occurs.

Also, be sure to have engine and computer ground(s) clean and tight.

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