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Old 05-18-2017, 12:34 AM   #1
resh9999
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Default Sudden Under Power

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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Old 05-18-2017, 12:48 AM   #2
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Default Re: Sudden Under Power

i kena before on another car, vacuum hose leak.
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Old 05-18-2017, 08:20 AM   #3
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Default Re: Sudden Under Power

Check your plugs too....
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Old 05-18-2017, 08:34 AM   #4
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Default Re: Sudden Under Power

Quote:
Originally Posted by resh9999 View Post
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 ,
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Old 05-18-2017, 02:17 PM   #5
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Default Re: Sudden Under Power

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)
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Old 05-19-2017, 01:29 PM   #6
resh9999
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Default Re: Sudden Under Power

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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Old 05-19-2017, 01:50 PM   #7
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Default Re: Sudden Under Power

How about your fuel pump bro, maybe the fuel pump cannot deliver constant fuel pressure while cruising
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Old 05-19-2017, 03:08 PM   #8
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Default Re: Sudden Under Power

i kena once. due to clogged Air intake
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Old 05-20-2017, 09:25 AM   #9
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Default Re: Sudden Under Power

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

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Old 05-22-2017, 10:10 AM   #10
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Default Re: Sudden Under Power

Quote:
Originally Posted by resh9999 View Post
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?
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Old 05-22-2017, 01:36 PM   #11
resh9999
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Default Re: Sudden Under Power

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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Old 05-22-2017, 02:27 PM   #12
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Default Re: Sudden Under Power

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Originally Posted by resh9999 View Post
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.
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Old 05-22-2017, 08:02 PM   #13
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Default Re: Sudden Under Power

Will do . Tq

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Old 05-23-2017, 10:42 AM   #14
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Default Re: Sudden Under Power

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