Super Duty & Heavy Duty1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
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You are correct that 2.77 kPa is .40 PSI. I'm not a gasser guy, but that's barely enough pressure to measure, much less run an engine on.
I've seen a few instances where OBD-II readers will read a value and then incorrectly assume a unit of measure. I don't know what the 2.77 represents but I really doubt it is kPa. You need to find a better way to read fuel pressure.
2004 F-250 SD, 4x4 FX4, 6.0L PSD
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