Why does my car bog/bounce when shifting?
06-09-2010, 04:09 PM
#1
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Why does my car bog/bounce when shifting?
Hey all,
While shifting gears my car really seems to bog/bounce when i release the clutch. Especially when driving it hard. Or, even if I'm coasting in second gear and then hit the gas the car doesn't just go it kind of bounces or stutters. Its like a jerk coming from the driveline. Reminds me of when I was a new driver and couldn't shift smoothly. But that rarely happens to me in other cars and typically sports cars can take harder shifting, no?
I've read about the weak clutch pedal mounting in our cars and I'm wondering if purchasing the race roots reinforcement might help my problem?
Or perhaps my motor mounts are worn and allowing excessive engine movement when the motor is quickly unloaded and then loaded again?
While shifting gears my car really seems to bog/bounce when i release the clutch. Especially when driving it hard. Or, even if I'm coasting in second gear and then hit the gas the car doesn't just go it kind of bounces or stutters. Its like a jerk coming from the driveline. Reminds me of when I was a new driver and couldn't shift smoothly. But that rarely happens to me in other cars and typically sports cars can take harder shifting, no?
I've read about the weak clutch pedal mounting in our cars and I'm wondering if purchasing the race roots reinforcement might help my problem?
Or perhaps my motor mounts are worn and allowing excessive engine movement when the motor is quickly unloaded and then loaded again?
06-09-2010, 06:33 PM
#2
A bog won't come from motor mounts. They cause drive line lash.
A bog sounds like you need a tune up. Check for air leaks.
Need more info on your car and maientence history.
A bog sounds like you need a tune up. Check for air leaks.
Need more info on your car and maientence history.
. Is that a yes ?
03-20-2012, 11:31 AM
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This thread has no real answers and I have the same question.
I'm assuming some mounts or bushings are bad but don't see any evidence, and I've only read about motor mounts going bad.
My issue is that, when in gear, at normal pedal position, if I floor it or release it, the whole car shakes front to back.
Now I'm thinking diff mounts but they look fine, and there are so many bushings in the rear. The also happens when launching.
I'm assuming some mounts or bushings are bad but don't see any evidence, and I've only read about motor mounts going bad.
My issue is that, when in gear, at normal pedal position, if I floor it or release it, the whole car shakes front to back.
Now I'm thinking diff mounts but they look fine, and there are so many bushings in the rear. The also happens when launching.
03-23-2012, 10:35 PM
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Your pushing the clutch in too far when you shift......
The way to avoid that bounce and jerk is to depress the clutch 1/2 way as opposed to all the way and shift quickly. If you press all the way, there is a bit of a delay for the clutch to engage again because all the grab of the clutch is in the first 3 inches of depression....
WCS, you still around with the same white RX8 and Nitro?? Haven't been on here for a few years, but still have my Red 2004 RX8. New Brakes and Suspension which gave me new level of enthusiasm to drive it!!
WCS, you still around with the same white RX8 and Nitro?? Haven't been on here for a few years, but still have my Red 2004 RX8. New Brakes and Suspension which gave me new level of enthusiasm to drive it!!
03-24-2012, 03:39 AM
#9
The way to avoid that bounce and jerk is to depress the clutch 1/2 way as opposed to all the way and shift quickly. If you press all the way, there is a bit of a delay for the clutch to engage again because all the grab of the clutch is in the first 3 inches of depression....
WCS, you still around with the same white RX8 and Nitro?? Haven't been on here for a few years, but still have my Red 2004 RX8. New Brakes and Suspension which gave me new level of enthusiasm to drive it!!
WCS, you still around with the same white RX8 and Nitro?? Haven't been on here for a few years, but still have my Red 2004 RX8. New Brakes and Suspension which gave me new level of enthusiasm to drive it!!
Longtime no see!
I'm still around however I'm turbo'd now running daily boost of 7.5 psi and top boost of 10.5 psi.
I would like to go higher but I've maxd the fuel pump
When I get back from wales we should go for a beer.
Dark brew and Neo are still kicking around as well.
03-24-2012, 05:45 AM
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WCS, that is too cool...Turboed....beautiful!! Can wait to hook up an catch up. Let me know when you are back in town and we'll hook up for sure and try to get Neo and Dark Brew to join with. Turbo is my next idea but I have so many questions for you before I get my 8 blown.
Safe trip back.
Cheers.
Safe trip back.
Cheers.
03-29-2012, 09:22 AM
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The way to avoid that bounce and jerk is to depress the clutch 1/2 way as opposed to all the way and shift quickly. If you press all the way, there is a bit of a delay for the clutch to engage again because all the grab of the clutch is in the first 3 inches of depression....
Its not anything with the clutch, example:
In 3rd, 6k or so, let off gas... the car bounces front to back about 2 times, hit the gas... the car bounces back to front about 2times.
All never touching the clutch.
05-24-2012, 06:36 AM
#14
Its the damn pedal position sensor!
Ok I sound nuts,but Ive taken the sensor,in hand and tested this last night and the night before.
Im ignorant as to its property's. There should only be open,closed.
So,If you remove the green bushing on the clutch pedal,the jerking and jumping and bogging in first and second will stop. Problem is when in forth threw sixth the acceleration will behave as if you're ridding the clutch, also cruz Control will not engage.
Ive spent about a week,made myself look like a fool and cut almost all of my fingers trying to figure this out. Please post if this has (quasi) fixed your issue.
Ok I sound nuts,but Ive taken the sensor,in hand and tested this last night and the night before.
Im ignorant as to its property's. There should only be open,closed.
So,If you remove the green bushing on the clutch pedal,the jerking and jumping and bogging in first and second will stop. Problem is when in forth threw sixth the acceleration will behave as if you're ridding the clutch, also cruz Control will not engage.
Ive spent about a week,made myself look like a fool and cut almost all of my fingers trying to figure this out. Please post if this has (quasi) fixed your issue.
05-25-2012, 11:18 AM
#15
It is a bitch to pace in rush hour with the accordian nature of starts and stops.
That getting on and off the gas causes the worst surging I've ever seen on a car, so I have to stay back and keep a constant speed while the aggressive drivers fill the gap.
At least you can push the clutch in to stop it.
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