2008 chevy cobalt
How do I check my fuel pump in a 2008 chevy
cobalt to see if it's working?
Use a fuel pressure gage and check fuel pressure. My info says about 55 psi, key on engine off. Hopefully there is a Schrader valve on your fuel rail, to check fuel pressure. If no pressure, check voltage and ground for the fuel pump. Any applicable trouble codes? Are you missing anything else, engine cranking, you have spark at the plugs and fuel injector pulse?