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06-16-2019, 11:58 PM | #1 |
Drives: Toyota Vios Join Date: Feb 2013
Location: MY
Posts: 49
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Rpm drop fast after letting off throttle pedal
My car is 2007 model sedan with 1NZ-FE mated to U340 4AT.
Recently I notice that when the car is speeding up from 15km/h to 60km/h while the gear is at the point of time in 2nd or 3rd position, the moment I let off the throttle pedal, RPM needle will drop fast from 2000+ RPM to around 1000 RPM then surge a bit up to around 1200 RPM. I can hear there is a minor shock noise from the front and feeling a little bit of jerk. While the gear is in 4th gear, either lock up or not, letting off the throttle pedal, RPM will just reduce slowly which I feel this is normal. What are the possibilities of the problem? |
06-20-2019, 12:49 PM | #2 |
Drives: Yaris 2008 Sedan Join Date: Nov 2010
Location: California
Posts: 85
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Is it possible the car is shifting into the next gear right around that point? What happens if you let off the gas at say 70km/h or 50km/h vs the 60km/h?
How's your trans fluid level? |
06-30-2019, 06:22 AM | #3 |
Drives: Toyota Vios Join Date: Feb 2013
Location: MY
Posts: 49
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06-30-2019, 02:01 PM | #4 |
Drives: 2010 Yaris LB Join Date: Jan 2019
Location: Rochester, NY
Posts: 30
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There's a transmission fluid dipstick. Just check it while the engine is warm and idling, and take note of the color on a paper towel.
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07-07-2019, 01:30 AM | #5 |
Drives: Toyota Vios Join Date: Feb 2013
Location: MY
Posts: 49
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fluild level is at correct level.
btw, i have solved the problem by cleaning MAF sensor. |
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