Go for the AT because it is 6-speed now which means good FC than the 5-speed MT. And by the way, the clutch is on the hard side for this generation and the 1st gear shifts too early.
The guy asked his question in 2009. Its very likely he has already made up his
Puwede i try, 1. Palit air filter 2. Linis throttle body 3. Linis MAF sensor 4. Check spark...
high idle RPM at engine start