Sudden Under Power

[resh9999]

While traveling at 140km/ph, car was under power n was vibrating . Its like 'semput' when pressing the pedal. Slow down was fine ,press the pedal /floored to max ,rpm doesn't goes high . Could this cause by steeper motor .

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[ixeo]

i kena before on another car, vacuum hose leak.

 

[vr2turbo]

Check your plugs too....

 

[pac_jb]

While traveling at 140km/ph, car was under power n was vibrating . Its like 'semput' when pressing the pedal. Slow down was fine ,press the pedal /floored to max ,rpm doesn't goes high . Could this cause by steeper motor .

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Check your maf sensor connector ,

 

[lsm1991]

chis can be so many things..... stepper motor, well i cant say for sure BUT, i guess the stepper would cause more issues when cold, once warmed up, u can unplug the bugger and barely feel any dif (speaking assuming the ac is off)

 

[resh9999]

Plug less then 4mth. Went to Ah Wah , he change Airlow sensor. But yesterday same problem while traveling to ipoh . When this happens there is a sound like lose chain , then I let go off the pedal n go at slow speed. Then if I speed up ,it be OK for while then happen again

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[pac_jb]

How about your fuel pump bro, maybe the fuel pump cannot deliver constant fuel pressure while cruising

 

[leinnz]

i kena once. due to clogged Air intake

 

[resh9999]

Fuel pump 5.mth old. Yesterday traveling back from Ipoh at constant 160 n 140 no problem at all .

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[biao]

Plug less then 4mth. Went to Ah Wah , he change Airlow sensor. But yesterday same problem while traveling to ipoh . When this happens there is a sound like lose chain , then I let go off the pedal n go at slow speed. Then if I speed up ,it be OK for while then happen again

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Gearbox problem?

 

[resh9999]

Went back to Ah Wah . He said must check all sensor to check which part losing pressure. Gear Box is fine . As far as I know its a hardcore gearbox .

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[biao]

Went back to Ah Wah . He said must check all sensor to check which part losing pressure. Gear Box is fine . As far as I know its a hardcore gearbox .

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your fuel pump just change not longer? try to take it out and assembly again. maybe the hose connection leaking inside the tank.

 

[resh9999]

Will do . Tq

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[vr2turbo]

Check fuel filter at the same time.....

 

[stutzedward]

Ah Wah is the best person to resolve your problem. Is it resolved yet? If he can't, I really don't know who can fix the problem.

 

[mdss]

That to me sounds like the car may have gone into "limp mode" or "safe mode" would check the fuel pump/o2 sensor or maybe as someone said it has a big airleak
Try running diagnostic as if its electrical it may have logged a code


Hope that helps.

 

[kayour]

or any wire cut off inside...from my experience
wire to plug coil, near the connector cut off..and cause the problem intermittenly
my solution..just by passed the connector

 

[4gbanger]

the only way to solve this problem is to check one by one.. sometime is a big issue such as ECU short circuit but sometime it could be simple as loose connector..