drivers complain about bus slowing to 30mph on grades while on freeway. no engine light at all but pulled a DTC 2372 SPN 94 FMI 1 fault code out of it. Cranked it with laptop hooked up and fuel pressure was in spec of 40-80psi while at low idle. havent checked it at high idle or under load. Had a former IH tech tell me the 2007 models had issues with lift pumps going out..he said he has seen them running with 0 psi and would continue to run until the filters were changed and it lost the gravity feed of fuel. any ideas? I hate to replace the lift pump just to replace it. I plan on checking the filter and screen in the next week.
Thanks for the input. No fuel lights on at all. Had a driver drive me down the freeway while I watched the fuel pressure on the laptop. the bus truggled to pull grades and fuel pressure would dip down to 17psi and it harldy ever reached past 45psi unless we were going down a hill. when I get it back in the shop and working on it I will update. Thanks again, feeling overwhelmed got lots to do this summer!
2007 IC RE inline 6 low power on interstate
Posted - 06/03/2014 : 12:01:16 PM
