Doug, for what its worth, I have 317,000 on my '74 K-jet injectors. Each 50,000 or so I pull the 4 injectors with lines attached and stick them into 4 glass jars so I can see the spray pattern. When you lift the Sensor plate, with the fuel pump running the injectors will start to spray. Lift a little, and it sprays a little, lift it higher, it sprays more of course. They are normally uneven in pattern after that many miles. In a 360 degree pattern, there will be heavy spots and some spots with no spray at all. I then remove the offending injectors, and lift the "Pintle" with two fingernails. I then blow them out backwards with 125 psi compressed air. I screw them back onto the lines and re-test. I had one stubborn one last time that I had two blow out twice, when they were all clean they spray a very nice, even, fine, 360 degree spray, like an upside down funnel. When I re-start the car, it will usually gain 100-150 rpm and is very smooth. Very satisfiying for the amount of work. hth Tom