Byrd85 Posted June 5, 2018 Share Posted June 5, 2018 Hey guys new here and hope y'all can help. got a 09 vision with an 485mp8. recently has started stalling randomly on the middle of the road and has no power at all. First thought was trash in the tanks because there was a bunch of water in them. Cleaned them out best we could changed all filters. Problem has gotten worse. Won't pull our empty low boy 45mph. Starts good cold but hard to start hot. Someone has put an inline electric pump on the truck at some point and my Mech seems to think it's going bad and the factory pump won't pull thru it causing it to die and loose power. But I'm curious why it's even on there to begin with as I'm pretty sure the truck didn't come with one as this one is wired to a switch on the dash. Thanks for any help guys Quote Link to comment https://www.bigmacktrucks.com/topic/53496-mp8-low-power-and-stalling/ Share on other sites More sharing options...
fjh Posted June 5, 2018 Share Posted June 5, 2018 In my opinion the pump was likly installed to overcome failing injector cup issue common issue with these now its to the point you need to address the real problem 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53496-mp8-low-power-and-stalling/#findComment-400019 Share on other sites More sharing options...
Byrd85 Posted June 6, 2018 Author Share Posted June 6, 2018 Wouldn't injector cups see fuel in the radiator? Quote Link to comment https://www.bigmacktrucks.com/topic/53496-mp8-low-power-and-stalling/#findComment-400120 Share on other sites More sharing options...
fjh Posted June 6, 2018 Share Posted June 6, 2018 compression in the fuel usually! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53496-mp8-low-power-and-stalling/#findComment-400138 Share on other sites More sharing options...
bbigrig Posted June 12, 2018 Share Posted June 12, 2018 On 6/6/2018 at 5:29 PM, fjh said: compression in the fuel usually! I'm wondering if like Detroit on the 60series we should start installing a thick o ring between the injector tip body and the injector cup to slow down the combustion gas infiltration to the fuel system. Quote Link to comment https://www.bigmacktrucks.com/topic/53496-mp8-low-power-and-stalling/#findComment-400452 Share on other sites More sharing options...
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