I have a 2004 Nissan Maxima (168,000 miles). I stopped at a red light, but I pressed the gas to go again and there was a slight pause before my car began to gain speed and accelerate at a decent pace.
At first, I thought it was my transmission, but even when I floored it my engine didn't roar and my RPM's didn't shoot up. After 3 seconds, the car began to gain speed and behave normally. It repeated that behaviour whenever I took a wide turn or came to a complete stop for that trip. The car is inconsistent in it's behaviour. After getting back in it again a few hours later, it ran as usual.
This has happened three times now, but it does not happen consistently. My oil, coolant and transmission fluids have been topped off.