sometimes car is quick, sometimes car is slow!!
 

Ok as the topic says, on certain days my car feels very quick, then on others it feels alot slower... what gives?!?

is it maybe just the humidity outside? cause recently the humidity here has gone real high! fog everywhere!! What else could cause a car to be slow sometimes????

The barometric pressure does affect how your vehicle performs, but I wouldn't think that it would affect it to the point where there was a noticeable difference like you seem to be having. Maybe I'm wrong, but your problem probably lies somewhere else...

what things should i check for??? and what do i have to do to check to make sure evrything in the car is working good and there are no problems??? im thinking of changing my O2 sensors....

Well if its hot, and muggy out that can cause a big difference.
I think that it may just be mental....I know my cars feel like they have 200 extra horsepower when the temp is nice and the breeze is good;). If you know it isn't mental try scanning the car on a "good" day, and then scan it on a "bad" day and compare the sensor readings and data from the car.

Good luck and food for thought:
When the wife would drive the 95 alot and I'd drive the 93 alot. My 95 ALWAYS felt quicker to me than my 93 when I would drive it, even though I know the 93 will rape the 95. But after driving the 95 alot the 93 feels way quicker, maybe your just getting "used to it?" and it will feel slower....:confused:

yea i'd believe what you are saying... cause i raced my freinds newer integra GSR the other day and blew past it like it was nothing..... so i guess maybe it is mental... im always paranoid that one of my cylinders isn't working or something!!!

You'd know if it wasn't....There be no doubt:D