Subject vehicle with 130k miles has a hard start issue. It turns over fine. The battery has been removed & tested good. The grounds from the battery seem to be clean & secure. It seems to take longer to start the longer it sits. If it only sits for 30 minutes it starts up pretty normal. Anything longer than that starts taking a while. Overnight results in quite a lot of time to finally fire up. Fuel pressure regulator diaphragm leaking? Fuel pump relay? Thanks.