Coming from a diesel background, I have extremely limited experience with gas engines.

Today, I heard what sounded like liquid being sprayed and then come to a drip somewhere in the engine after I shut it off. I was replacing vacuum lines and connectors and a Voltage regulator. Is this normal, or is the liquid dripping sound possibly some kind of leakdown happening?

Also, I replaced the OVP, voltage regulator to no improvement. Car still starts like it used to and drives like it used to. Keep in mind - I was going to replace these parts anyway since they had never been replaced or even checked. (voltage regulator brushes were worn down substantially).

Next up, Fuel filter. Are Fuel pressure regulators known to go bad?