It just quit at freeway speed. first thing I did was scan it, p2290 low inj pres

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I checked IPR screen its clean and in good shape. Removed ICP and installed gauge 0 pressure! removed gauge no oil period! Removed hpop ball bearing still in its place, pump feels ok ??? Air checked some leakage can be heard in fill tube. how much leakage can there be if any? Do hpop jujst fail w/o warning. Come to think of it, the last time It started it did take 2 trys to start.