Quote Originally Posted by lpugh View Post
I am using more fuel than merc monitor indicates you probably have a fuel system problem. Get it checked out, make sure there are no leaks anywhere, that pulse pump is good and air/fuel pressure are dead on and no leaks, internal or external, would be wise to also have injectors flow tested and validated
smartcraft is very accurate in calculating fuel used, it cannot compensate for pressures or leaks out of spec.
+1.

Yours is indeed a System Monitor. As with all Smartcraft instruments, the displayed fuel consumption is provided by the PCM, taken from injector pulses and accurate to within 2% of actual. The only "adjustment" is zeroing out fuel used when refueling.If you're pumping more fuel than the monitor indicates was used, follow Leon's recommendation.