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Wheatley, Arkansas | A 2000 FL would I assume have a 1550 torque engine, the 430/500 could be set up several ways in the ECM, from a low of 370 to a high of 500 with various split hp settings. Does this truck have a boost guage? If it does what kind of boost are you getting? Is your engine a 1800 or 2100 RPM engine? If your other trucks don't pull down, even with the lighter loads, this one shouldn't either. I would check the fuel filters, ECM setting and air to air first. We had one with a leak in the intake manifold gasket that took forever to find, it ran fine just wouldn't pull good. It has been my experience that all Detroit 12.7 have a weak assometer but normally pull pretty good. The torque peak on this engine is 1200 RPM, but you should see the boost run up to around 25-28 psi at @1700 RPMs on a hard pull. | |
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Detroit 12.7 pulling ability?
