hugh2langley Posted February 2, 2018 Share Posted February 2, 2018 2012 CXU 613 mp7 truck is hard to start when cold or hot. No codes checked for leak around fuel filter housing no fuel in oil or coolant any suggestions after the truck starts running and pulling good Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/ Share on other sites More sharing options...
Dirtymilkman Posted February 2, 2018 Share Posted February 2, 2018 Injector cups. I just replaced mine. Hand prime the motor then try to start. Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/#findComment-390991 Share on other sites More sharing options...
hugh2langley Posted February 2, 2018 Author Share Posted February 2, 2018 Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/#findComment-391009 Share on other sites More sharing options...
INOMACK Posted February 4, 2018 Share Posted February 4, 2018 I’m with dirtymilkman, likely an injector sleeve pushing combustion into the fuel system. You could check to see if there’s air bubbles in your fuel tank at the fuel return pipe. At idle. its likely the injector won’t be reuseable either, will have damaged sealing surfaces. good luck with er. J Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/#findComment-391162 Share on other sites More sharing options...
Trashmack21627 Posted February 5, 2018 Share Posted February 5, 2018 Injector cups sounds about right we're you located? Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/#findComment-391216 Share on other sites More sharing options...
hugh2langley Posted February 5, 2018 Author Share Posted February 5, 2018 In GA going to try and get it up to the Mack shop in Atlanta Quote Link to comment https://www.bigmacktrucks.com/topic/52383-hard-start/#findComment-391222 Share on other sites More sharing options...
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