TotoCh613 Posted April 17, 2017 Share Posted April 17, 2017 Hello im new at this site , so please be patient with me. Ive got a 1998 ch613 mack with a E7 425hp, she cranks rite up in the morning's but when she is warm its takes forever (starter speed sounds right turning the motor).. my electronic malfunction light some days comes on.. but cuts off by itself. Dont know what else to look for..? Can it be compression?? Thanks guys for any help Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted April 17, 2017 Share Posted April 17, 2017 First you need to read the ecm codes.Then go from there.It could be low voltage to the ecm.Sometimes a hot engine is harder to turn than a cool engine and pulls the voltage too low.Only way to check it is get some one to check the ecm voltage when cranking and hot. Quote glenn akers Link to comment Share on other sites More sharing options...
41chevy Posted April 17, 2017 Share Posted April 17, 2017 (edited) Could be something as simple as grounds Edited April 17, 2017 by 41chevy Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
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