1994 GMC Sonoma SL 4 Cyl 2.20L
Intermittent Stalling, Low Fuel Pressure. Why?
I've been having this issue for a few months now, has gotten progressively worse.
First step is to measure the fuel pressure at the outlet side of the fuel pump, and again at the engine fuel rail port. These two readings should be very similar. Fuel pressure should be between 41-47 psi while the pump is running with key key on and engine off. When the engine is running (at idle speed) the fuel pressure should read 31-44 psi.