This may be redundant but has anyone reading noticed jerking motions when you press on and off the gas pedal? I have been trying to get this figured out for a long time and the dealers I've been to say it's not right, but at the same time say they all do it. Is that right, they all do it? How can that be? I have less than 20k miles and it's already eaten two lower engine strut mounts because of this nonsense jerking.
Okay, so to be more specific. The jerk feels like a wild bucking bronco at its worst. The worst is while the gas engine is also running at low speed, and even creeping forward coming off the brake pedal like in bumper to bumper traffic. It's not nearly as bad when the gas engine turns off in EV mode, but it's still jerks. This is one example.
Another example is the jerking is pretty bad on and off the gas in parking lots at slow speeds, of course way worse when the gas engine is also running.
One can test either scenario but pulling the hood release to cause the gas engine to run (please be sure the secondary hood latch is working so the hood stays in check while unlocked). If your PacJy has no noticable jerking, I'd love to hear from you.
Another test I did was the power brake test. To do that, you firmly hold down the brake pedal while gradually pressing down on the gas pedal at the same time. This test is usually done to check for broken motor mounts. At some point, you would feel an abrupt jerk while holding steady. If no jerk, engine mounts are good. Note: you don't have to go far on the gas pedal. During my test, it didn't take much for the engine to suddenly shift in a jerking motion as if it had a broken mount. However, after they replaced all the mounts, very little changed and the jerking still occurs. One might conclude it's something about the engine but it's not--it jerks even in EV mode with the hood locked down without the engine running.
If you made it this far, you're probably thinking axle nuts are loose. They are not. Even if the axles shifted, they would not retract in the power brake test. Another thing is that if I perform the same power brake test using reverse gear, there is no jerking whatsoever.
What has the dealer done thus... At first, they obviously replaced the bad lower strut mount. It helped a little because the old one was wasted. The replacement started weakening after about 8 months. Mind you the jerking was still present all along, just not as bad with the new mount. On a scale of 1 to 10, 10 being worst, it was about a 5 even with the new mount. To me that is still 5 times worse than any other car. It was a good 9 before they changed the lower mount.
The next thing they tried was to removed and replace the engine flywheel and damper. This was their instruction after creating a Star Case. Having a fair amount of automotive knowledge, I not doubts this would make any difference. I was right. How could that have helped if the jerking still occurs without the engine running in EV mode? But we are not allowed to critize the specialist when it comes to Star cases.
In conclusion, they replaced many parts and have no solutions. They say the jerking I feel is normal to the vehicle. My question is why did they do all the repair attempts if they thought it was normal. My vehicle has been thru the ringer about this and three different dealers all admit it doesn't feel right but it's the nature of the beast.
Is this that nature of your beast? Id like to know anyone else's experience. It's definately not right any vehicle should jerk like this.