OJ Avery Posted May 3, 2018 Share Posted May 3, 2018 I have a 2012 with a mp7 2010 emissions (spark assist) the problem I'm having is it looses its fuel prime over the weekend, sometimes overnight. I replaced the fuel filter head and filters, one check ball was sticking. Still did it. Replaced the "pressure regulator" on the return side on top of the head, still did it. Did an air in fuel test and it looked great. Did a warm hold function, that was good torque was 60ft# at idle. Did a cylinder balance test and #2 was off the most (+23), #6 was next at -20, # 3 -19. This vehicle only has 37k on it. But its a paint truck, really heavy and really slow driving. Do I have an injector leaking down causing it to loose its prime? Quote Link to comment Share on other sites More sharing options...
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