Sluggish (unresponsive) 2000 Maxima

#1

Lately my 2000 Maxima is very sluggish or unresponsive but not consistently and usually improves after driving for a few minutes. Yesterday, however, it was a problem for an entire 1/2 hour trip in the cooler, rainy weather. Best guesses? Spark plugs, ignition coils?

#2

Potential fuel pressure problem,are you current on your filter replacement

#3

It is warming up? Is the thermostat stuck open?

#4 
How old are those plugs?  If you don't remember, I would suggest it is time to replace them anyway, so why not start there.  Have you had any CELs?
#5

More research led me to a bad MAF sensor. I replaced it this weekend and problem is solved. Car’s performance is great again!