Hi i am new here. I have a Persona Elegance M-Line - Manual - 2011.

Sometimes I feel the car engine response is bad. It feel very underpower when I shift gear, it feel like the engine shudder when we try to let our car move on low speed with top gear. It feel delay between the gas pedal is press and the engine response kick in.
delay is the throttle lag (most likely)

But sometimes the car feel smooth and good response when drive on next day.
this is how MAP sensor works.try go up genting...then jalan jalan.after tat when u leave genting and reach back downhill,u will feel ur car slightly more powerful

Will it be ECU problem? I have this problem since I got this car 2 years ago.
ECU prob? I wouldnt say so.it shud b the close loop control tat cause the after-effect

Any advices & suggestion would be appreciated! ><

Not my problem.  Maybe you can take over as TS from ckdenion. 

I guess never do the cleaning yet haha. ok I wll try on that 1st. thanks

Maybe because of aircon compressor to powderfull? you will feel smooth when compressor off but when compressor kick you may felt underpower. better switch to warmest temperature @ 30c only, the time interval for compressor off will be slightly longer than 20c.

Hiii! Long time no see

ckdenion, LCP can nego? LOL

(Petrol+toll) X 2 =         
Cant la bro......

Lol! Because my persona so reliable so dont need to headache ask here hahah.

Zeng and xandras still alive or mia?

iXora.ix durian ada lagi ka?

Really, found another world perhaps? 😅😅

I dun want to live in this world anymore.

Super mat 7 leh. I thought u go upgrade to Dewgong? 

What happened? You got make changes there meh? Really lemon car.

how is gearbox kong?

PM your story lah bai.

What is the symptom form clutch slip ar ???

New City gonna come out, wait first then compare with tukong...

so what happen next?
change gearbox then how much it would be? really kesian sama u.

Your car is manual meh? 

which brake pad is suitable for our Persona?

Almost hit 80k mileage. Need to change timing belt. Where can get cheap and good timing belt and service around Klang Valley other than the COSE at KESAS?

Auto pakai torque converter....you think DSG meh.

Torque converter inside got lockup clutch, but that one faulty won't cause car cannot move geh.

Maybe it's the stator kong.

my workshop didn't carry Borch brake pad but Metal Bendix King, how you think about his? use before?

Outside workshop should be ok right? SC expensive but service should be good.

If you want performance brake that eat your rotor like shit....ya...go for metal king. I don't recommend bosch, too much brake dust. Use FBK brand (proton oem also), as good as bosch and little brake dust to boot. Abt RM90 to RM100 a pair outside. I'm using it for my auto.

my workshop didn't carry Borch brake pad but Metal Bendix King, how you think about his? use before?

Then not sure dy. Maybe it's the gearbox itself instead of the torque converter.

havent diagnose ke?

Using Trestor Advantage, IINM. Got it for 80 bucks for front side. Less dust than stock.
No TT for you then. 

Ada aku kesah? I tak dapat OBD2 reader pun. 

Bagi R3 rims lah.