CCMtruck Posted June 19, 2019 Share Posted June 19, 2019 I need a fuel guru! I'm working on an 2012 LEU613 with an MP7. The fuel pressure starts off great (55psi) but under a load it drops (12 psi). To make a long story short. I have already replaced fuel filter housing, fuel pump and conical injector cups. I have even gone as far as replacing the suction fuel line because i was running out of ideas. I though i had it cured because the fuel pressure returned but slowly started dropping. The engine never dies, it just doesn't have power. Quote Link to comment https://www.bigmacktrucks.com/topic/57752-mp-7-fuel-issue/ Share on other sites More sharing options...
steeler Posted June 19, 2019 Share Posted June 19, 2019 Did you check the fittings at the ecu cooler plate? They are notorious for catching debris. Quote Link to comment https://www.bigmacktrucks.com/topic/57752-mp-7-fuel-issue/#findComment-425715 Share on other sites More sharing options...
CCMtruck Posted June 20, 2019 Author Share Posted June 20, 2019 I will check it today. Thanks for the info. Quote Link to comment https://www.bigmacktrucks.com/topic/57752-mp-7-fuel-issue/#findComment-425750 Share on other sites More sharing options...
CCMtruck Posted June 25, 2019 Author Share Posted June 25, 2019 Update: Just like steeler said. I found aluminum pieces in the inlet side of the ecm cooler plate. Its the simple stuff we forget sometimes. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/57752-mp-7-fuel-issue/#findComment-426122 Share on other sites More sharing options...
steeler Posted July 1, 2019 Share Posted July 1, 2019 On 6/25/2019 at 3:35 PM, CCMtruck said: Update: Just like steeler said. I found aluminum pieces in the inlet side of the ecm cooler plate. Its the simple stuff we forget sometimes. Good deal. Glad you found the problem! Quote Link to comment https://www.bigmacktrucks.com/topic/57752-mp-7-fuel-issue/#findComment-426533 Share on other sites More sharing options...
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