What to do when your fuel pressure goes down?
What to do when your fuel pressure goes down? Also, even if the pump puts out 60 psi while the engine is running, the pump cant pressurize the system for immediate start up once the pressure has dropped significantly. Mine would need to be cranked for 10-15 seconds before the engine would start when it was the worst. How to check fuel pressure in Gen 5.7L? 1. Fuel pressure regulator- pull the vacuum tubing off the fpr and if there is fuel, diaphragm is shot, Replace the fpr. Oh I did not notice you have an old gen 5.7L. FPR...