you aren't supposed to put water in the gas tank...jk...
is it possible you are missing the gear? what you thought was first, maybe you keep missing and putting it in 3rd? I know it sounds really dumb, but it happens. How long have you been driving stick?
Also, does your car Rev up in neutral quick or is that slow as well? Its possible that your throttle body may be messed up or you could have a messed up fuel delivery system...
5 Speed Manual
Alpine CDA-7895 Head Unit
12" Alpine Type-R, sealed box
Pioneer 400w amp for $20 at a yard sale (to replace my fried MRV-1507)
Infinity Kappa 4" 2-way speakers(rear)
Infinity Kappa 5.25" component speakers(front)
Debaffled airbox, K&N filter
Tracked Mud on carpets
Shampooed and cleaned carpets