Postby smj999smj » Thu Jan 28, 2021 1:52 pm
Disconnect a fuel hose and route into a clear jar or container and then turn the key on to pump some gas into the container. See what it looks and smells like. If the gas is stale, it's never going to fire your engine unless you get it out of the gas tank and replace it with fresh. If that's the case, you may also want to consider replacing the pump with new and definitely replace the fuel filter, which is above the rear axle. As far as the fuel pressure regulator, there is only one vacuum hose going to it. If no vacuum gets to the regulator, be it because the hose is disconnected, leaking or there is a clog preventing vacuum from getting to the hose, the fuel pressure will be high, the same as whatever the fuel pump's output is (typically around 45 PSI). If the diaphragm inside the regulator fails, it will cause gas to get sucked into the intake manifold via the vacuum hose. The regulator is at the not-so-convenient, back side of the engine. Checking the fuel pressure never hurts; if you don't have a pressure gauge, most auto parts stores have them available to loan if they have a tool loaner's program. Also, the fuel pressure regulator sits at the end of the fuel rail, so it effects pressure, consistently, to all injectors on the rail, not just one side.