My car jerks if during acceleration, I release the gas pedal
On my 1.6L DX, manual transmission, it is most noticeable in 1st and 2nd gear, if during acceleration, I let go the gas pedal suddenly, the car jerks and nose dip forward for a second or two. Otherwise, the car accelerates smoothy and the RPM increases without jerks if I keep pressing on the gas pedal.
What could be wrong? I don't remember the car doing that before. It has gradually doing that over time and now it is very noticeable and annoying.
To test your mounts, assuming your car has auto tranny, apply brakes while giving a little throttle in "D". The car is NOT moving. Have someone else outside the vehicle to observe if the engine has excessive movement.
To test your mounts, assuming your car has auto tranny, apply brakes while giving a little throttle in "D". The car is NOT moving. Have someone else outside the vehicle to observe if the engine has excessive movement.
With a manual tranny, apply ebrake.
Good way break something. All you need to do is put it in park or neutral for the auto, or neutral for a manual. a little engine shake is normal. Personally, these are not that smooth when you gun it and mine will also lurch just a little after you let off the gas if you've been hard of the gas. do you have vibrations while driving? If so your motor mounts are on the way out for sure.
I am very gentle with my cars and don't abuse them.
I did the test by applying the hand brake, put the manual tranny into the first gear and also the reverse, I give a bit gas and the engine physically moves up and down by less than one inch, is-that normal?
Other than the car jerking during acceleration if I suddendly release the gas pedal, the car has no vibration during driving or during idle.
That is strange because I don't remember it used to do that before. I also drive a 2009 corolla and the car does not jerk if I suddenly release the gas pedal during acceleration
If you are going 60 or 70mph up a hill and then you release the gas while pressing the clutch at the same time, does it jerk. It sounds like normal stick driving with possible mount issues (front or rear).
If you are going 60 or 70mph up a hill and then you release the gas while pressing the clutch at the same time, does it jerk. It sounds like normal stick driving with possible mount issues (front or rear).
if I release the gas and press the clutch at the same time, the engine does not jerk at any speed
My car generally jerks a little when changing gears, but the three-speeds were never smooth anyway and I've not driven the manual to say what it feels like in these. How old is the clutch in it, does it still engage smoothly?
the clutch does not seem to slip, this is the test I did to see if the clutch is slipping:
test 1: in 2nd gear, accelerate sharply to 6000 rpm: the car accelerate smoothly with a constant increase in speed proportional to the increase in RPM, no jerk nor slip
test 2: hand brake engaged, put the tranny in 3th gear, try to move the car, it stalls right away so the clutch does not slip
test3: from a dead stop, in 4th gear: tried to accelerate the car by releasing the clutch slowly, the car accelerate and catch up in speed with a bit of vibration but does not stall
test4: move the car up a steep incline from 1st gear: no problem at all
the above tests indicate the clutch is still good right?
Personally i think it needs a tune up. Also what is your definition of jerking? as in vibrates? Jerking is not because of motor mounts, its because of spark plugs and such goin bad. According to your scenerio, i doubt its even a tuneup thing cause it usually does that when you accelerate, not when you let go off the gas pedal but its worth gettin looked at.
It might even be a transmission issue, but im just guessin
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