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cummins M11 hard start help

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6 years 2 months ago #193312 by JOHN.K.
Replied by JOHN.K. on topic cummins M11 hard start help
maybe compression is down....and maybe the Jake brake is keeping valves open.

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6 years 2 months ago #193326 by TonyD
Replied by TonyD on topic cummins M11 hard start help
If it is an electronic M11, the check valve on the ecu cooler, which a mechanical engine doesn’t have, is known to play up. It is internal to one of the connecting elbows.

All good DD. It looks like the best and non cost saving way is to get the computer to find out.
My thoughts are, if it does not start easily in the mornings but starts ok the rest of the day it is possibly the slow leaking valve. Whether it is mechanical or electronic, once the engine is cranked enough it can start.

But then when have I ever been on the right track & got there. Just hope I can help.

Indiana, haven't heard from you. Any success?

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6 years 2 months ago #193327 by TonyD
Replied by TonyD on topic cummins M11 hard start help
Hey Werkhorse,
Did you ever get confirmation of the issue with your M14?
Did the symptoms change?

Tony

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