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valleybusman
Top Member

USA
815 Posts

Posted - 03/19/2021 :  4:59:07 PM  Show Profile  Send valleybusman an AOL message  Reply with Quote
I have a little IC bus that has been starting hard . Yesterday it died and driver left the bus in the yard . I startd the bus and let it run and took it out for a test drive . Told driver nothing wrong . Today the boss went to start the bus and it wouldn't start . So I went out and it started and i let it run and the driver took it over to another building and it died Wouldn't start . I got it going and on the way to the shop it quit . I hooked up my laptop and the only real issue said low IDM relay voltage . I cleared the codes to see if the IDM relay would show up again . Well this 571 came up saying something about number one was an issue but not worry . I know a bad relay or power to the relay will kill an engine . So do I need to take care of this issue

Brook Peacock
Senior Member

116 Posts

Posted - 03/23/2021 :  01:23:56 AM  Show Profile  Visit Brook Peacock's Homepage  Reply with Quote
I have one that has been doing the same thing for a long time. Last year I did the pucks, and injector o rings. It is now back to a longer start.
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Bluenozer
Top Member

Canada
701 Posts

Posted - 03/23/2021 :  02:40:18 AM  Show Profile  Reply with Quote
you have IDM issues if the power wires check out

OEM trained in wiring and all engine platforms for over 20 years
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