First off, my VX runs like a champ- engine feels strong, sounds good, idles smoothly and has no CELs. Typically when I start the VX it takes about 1 second to turnover. Recently I have noticed that the VX will take 3-4 seconds (seems like forever) to start after sitting for 2-4 hrs. If the VX is off less than 2 hrs or more than 4 hrs, it starts in the normal 1 second. No matter how long it takes to start, the engine + idle are always smooth once running. It just started doing this a few months ago so I know something is wrong and I'm afraid it will keep getting worse until the VX doesn't start.

Has anyone ever experienced this? I haven't found the same problem posted on the forum yet.

Heres what I've done trying to troubleshoot the problem:
-Replaced the fuel pressure reg & fuel filter
-Used fuel injector cleaner + using quality fuel
-Checked proper voltage on battery/alternator
-Starter was replaced last summer

What should I do next, spark plugs or ???

If I can't figure this out soon, i'll take it to a shop. I've been holding off on taking it in because the shops around here are horrible. Any ideas would be appreciated as i'm losing my mind trying to figure it out.