I just cant take it anymore today i went to go put in some gas because i was near empty well the gas pump stoped @ 8.5gal and i was like wth this cant be so i keep squeezing the pump and i get it to 9gal and still i was confused i stoped the machine went to the one on the other side well this one puts in 4 more gals and stop wont go anymore so im like wth this cant be right cause i should have gotten at least 15gal or 16gal this is the first time this ever happened.and yeah for a 2 months straaight when i put in gas the needle never gets to the "full" part even when i put in like 16+gallons this seriously sucks. and other thing is my a/c doesnt even work well i put it to 60degrees but it is warm not even cold and my seat heaters dont even seem like they even work my dads clk freakin burns but mine... i cant even feel it .. and when i shift at like 5.5krpm and switch gears the cars feels like it "dumps" when i drove my cousin supra this never happened is this just happening to me or everyone else... maybe i just got a lemon i dont even have 14,000 miles on it. and when i shift it feels "bumpy" my cousin said it might be the transmission fluid but i dont know ... i was going to wait and tell the service department about all this when i had to go for a check up for the 15,000 service. this blows !!!!

 

im not gonna even try to unjumble that mess...

2003 6MT Laser Red Coupe, Premium, Chrome 18's

 

As for the gas thing, its probably the nozzle of the pump. This happened all the time in my old car. I fixed this, by not putting the nozzle all the way in the filler neck. I pulled it out about 1cm, and the problem went away.It caused by the angle of the nozzle in the filler neck. If the gas foams too much, it'll trip the auto shut-off.

 

i already tried that .... didnt work

 

Turn the gas handle upside down. Trust me this will work. (this coming from someone who lives in a state where pumping your own gas is illegal....hehe) Seriously, out in Az at my parents house, I have the same problems with my car out there. Just turn the nozzle upside down.

2003.5 G Coupe premium. 6MT Black/black
Come join the G35Driver chat on EFnet. Channel name is #G35Driver. Catch me on aim (Xtreme03s10) if you need help setting up mIRC.

 

No offense, but how long have you been driving manual transmission? Is this your first manual car? The problems you're having with the tranmission sound like they could be caused just by not having smooth transitions between gears, esp. since you're shifting at almost 6000rpm. It's gonna be difficult to have a really smooth shift when the rpms are that high.

2003.5 G35 Coupe 6MT Black/Willow
- Texas Tech Mechanical Engineering - Texas Tech Advanced Vehicle Engineering -

 

I would'nt even wait for your next check up if i were you, you should go harass the dealer the very first time you notice a problem.

Also, i agree with Rwjcp721, sounds like you're not driving standard properly.
On my first manual car, my car shifted like how you describe yours to be shifting, and it was because i didn't know how to drive manual very well. As a result of it i completely burned my clutch.

 

This is my first manual car but i use to drive my cousins supra for awhile and his car never did this..i dont think it is me but it doesnt hurt to tell you service department.