Mga sir, this is my 1st thread at post,, hope you could help me, i have a corolla GLI, before when im in 4th gear, pag umabot ng 2,100-2,200 rpm, nsa 70KPH nako, pero ngayon 2500 rpm palang bago umabot ng 70KPH, tapos sa 5th gear, 100 is at 3,100rpm, tapos 120KPH sa 4000 rpm na ilang beses nako nagpa tune up at timing, same parin, changed my gear oil, fuel filter, air filter, cleaned throttle, tatlo narin mekaniko pnag pa tune up, sabi nila sa speedometer ko raw, tapos pnapalit ko speedometer sensor ko, same parin may nabasa ako dto sa forum na 3000rpm* 100kph, 3200rpm* 120kph; 3500rpm* 140kph; 4000rpm* 160kph kaya parang grabe naman po yta pagkahina ng kotse ko any ideas po, thanks in advance