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Message: <blockquote data-quote="bobcatguy" data-source="post: 102358" data-attributes="member: 11457"><p>The new common rail systems run on EXTREMELY high pressure. Just to fire it needs somewhere around 2000 psi. It operates around 6000 psi but can go as high as 26,000 psi. Hard to check the pump under that kind of pressure. I guess they're changing the high pressure fuel pump. I was told if the pressure relief is stuck open and you pinch off the fuel return line, it will pop the return line off when pressure builds. I was told this was tested. I hope for the sake of my customer this fixes the problem.</p></blockquote><p></p>