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Discussion Starter · #1 ·
I have a 08 6.4 and I recently did a full engine build with New from ford HPFP,cover gasket, control harness to the HPFP, injectors and New fass lift pump. I have good idle with 4800 lbs. of rail pressure but the second I hit the throttle the rail pressure goes to 0 and dies. But other times it will make 24k very intermittent. More times then not it will just die. but allway restarts the only Code i get is P2291 - Injector Control Pressure Too Low - Engine Cranking
 
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