Advise needed on Hyundai Matrix

[Tigershark1976]

my Wife Hyundai matrix has serve us very well all these years. I seldom drive it cause my work require plenty of driving and matrix FC is horrible. I notice that the car act very weird recently when I travel North using the Matrix instead of my own Vios.

 

The car is no longer responsive and its struggling when i cruise on NSHW at 120km/h... the "struggling" is similiar to driving at 50km/hr using 5th gear when driving a manual transmission car.

 

Its at 130K+ now and I have perform oil change using branded fully syn oil (Amsoil, M1, Castrol Edge, redline & etc) every 9K+... As for the AFT, i change it every 30K using Hyundai original SP3 ATF. Sparkplug was gapped and cleaned every 20K, Air Filter using original and replaced every 20K,

 

What could be the problem? any advise? I suspect its the fuel filter cause thats the only thing I have never replace but is my problem sounds to caused by a clogged fuel filter?

 

btw, the Matrix is 100% stock....

Edited March 22, 2011 by Tigershark1976

[Byond]

can try to change the fuel filter

 

i recently changed mine and the ride is very smooth flowing and its like ready to chiong

[5936]

I concur with fuel filter

Not enough fuel to feed engine at higher load.