Hi I have a 1988 chevy celebrtity
2.8 v6 Great car for many years. But now engine cranks over for about 5 seconds or so before it fires up. (almost always when it sits overnite)I used to hear the fuel system pressurize when I would turn the ignition key to the on position (but not crank it over) Now I do not hear the Humming sound of the fuel system pressurizing prior to starting.
Once the engine starts, the car runs fine at idle or even at high speeds.
What part could have failed ? Thanks for any help Xray