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i have tried searching here and thirdgen several times as well as google. i know people sell chrome springs of all different pressure settings. does anyone know the colors of the gm springs in the tbi units and about what pressures they are???? i have a tall orange one.
I've seen orange, brown and rust colored ones but they were all the same for pressure. There is one factory spring with much higher pressure in 94-95 7.4L engines that ran a injector similar to 4.3L size at 30ish PSI.
Two aftermarket springs are sold, one to 18-20 PSI and one for 18-30+ PSI. The high one only needs about 1/4 turn per one PSI...