Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Thanks for using JA. You need Between 60 and 65 PSI to start and between 55 to 60 psi to run. The Injectors in this engine require a least this amount to open. The
injectors are poppet nozzle type, even if the injector pulses the poppet nozzle will
not open an spray fuel. I have seen Fuel pumps will 55 psi and the vehicle will not start.
If your lucky with 55 psi you can spray a little carb cleaner in the throttle body and it
will start and might stay running. If this info helps, PLease help me by accepting the
answer and a positve feedback. Thanks brian.