Sudden Under Power

resh9999

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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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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 .

Sent from my UItra 4 using Tapatalk

Check your maf sensor connector ,
 
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)
 
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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Fuel pump 5.mth old. Yesterday traveling back from Ipoh at constant 160 n 140 no problem at all .

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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?
 
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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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.
 
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.
 
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.
 
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
 
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..
 

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