Bubba1987 Posted January 31 Share Posted January 31 I just bought a 2015 Mack CHU613 with the MP8. Has 480,000 miles on it. It’s hard to start after it sits for a while. If I pump fuel manually it starts right up. Like it’s loosing its prime somewhere. Is there some things I can replace before redoing the injector cups? Quote Link to comment Share on other sites More sharing options...
MACKS Posted January 31 Share Posted January 31 Check all the return lines.. 1 Quote Link to comment Share on other sites More sharing options...
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