crank angle during the same crank angle duration the trace for cylinder 8 indicates that the pressure fall off is much greater as a result of there having been insufficient fuel injected during the pilot portion of the injection event to initiate combustion when cylinder 8 is served by a prior art standard injector 14 referring to fig5 as the plunger 68 continues moving downwardly on its pumping stroke the trailing land 71 of the plunger 60 blocks the spill port 68 and the circumferential groove 74 no longer is in fluid communication with the spill port 68 the fuel pressure in the fuel pump chamber 66 again rises opening the high pressure check valve 76 to again unseat the check 50 and begin the main portion of the injection event by injecting fuel through the orifices 52 referring to fig6 the rise in the cylinder pressure for cylinders 2 4 and 6 occurs initially at about 70 after tdc and continues to about 15 u00b0 after tdc it is noted that the trace for cylinder 8 indicates that the rise in cylinder pressure is delayed several degrees as compared to the rise for cylinders 2 4 and 6 when cylinder 8 is served by a prior art standard.