Infamous jerk before stop
- Thread starter redline15
- Start date
lkm
Well-Known Member
Re: Infamous jerk before stop
The complexity of the issue is that it both mechanical and electronics. It's easier to solve the electronics first. I had the "jerk-before-stopping" issue a few years ago, and a simple clearing of adaptation values and reprogramming of the EGS solved it. That was an electronic issue.
Some bros are a little more unfortunate. The software solution didn't work. And that resulted in the necessity for mechanical repairs.
So, really, my recommendation is to do the less expensive option of reprogramming of the EGS first. Pray hard. And if that doesn't work, then it's time to open up the transmission...
gluejuice;923568 said:
The complexity of the issue is that it both mechanical and electronics. It's easier to solve the electronics first. I had the "jerk-before-stopping" issue a few years ago, and a simple clearing of adaptation values and reprogramming of the EGS solved it. That was an electronic issue.
Some bros are a little more unfortunate. The software solution didn't work. And that resulted in the necessity for mechanical repairs.
So, really, my recommendation is to do the less expensive option of reprogramming of the EGS first. Pray hard. And if that doesn't work, then it's time to open up the transmission...
canuck78
Well-Known Member
Re: Infamous jerk before stop
Should be common throughout, unless those bro that go against PML advice to change ATF at every 40-60k, against the official BMW stand that the ATF is a lifetime fluid and do not need replacing.
Btw BMW lifetime refers to 100k miles, so around 160k! In our tropical stop and go city traffic, the AT wears faster and most would starts acting up ar 100k km.
Any bros still using their e90 and have done ATF change can comment if their ride has this jerk?
Should be common throughout, unless those bro that go against PML advice to change ATF at every 40-60k, against the official BMW stand that the ATF is a lifetime fluid and do not need replacing.
Btw BMW lifetime refers to 100k miles, so around 160k! In our tropical stop and go city traffic, the AT wears faster and most would starts acting up ar 100k km.
Any bros still using their e90 and have done ATF change can comment if their ride has this jerk?
PlAy7r;923616 said:
canuck78
Well-Known Member
Re: Infamous jerk before stop
I learnt from Rod at R2D whether the valve body (set of clutch like gears, many of them) or solenoids ( which is made of plastic, no wonder it will spoil) can read from the adaptation values when hook-up to the autologic unit.
The software reset is a temporarily delay solution, but sooner or later when the values get high (due to wear and tear), the only road ahead is replacing the parts.
Overhauling the valve body & solenoids is expensive, parts alone is already 2.2k but solenoids alone is much cheaper.
Can try reset, ATF fluid change, sooner or later valve body or solenoids part change if afflicted with the infamous jerk!
I learnt from Rod at R2D whether the valve body (set of clutch like gears, many of them) or solenoids ( which is made of plastic, no wonder it will spoil) can read from the adaptation values when hook-up to the autologic unit.
The software reset is a temporarily delay solution, but sooner or later when the values get high (due to wear and tear), the only road ahead is replacing the parts.
Overhauling the valve body & solenoids is expensive, parts alone is already 2.2k but solenoids alone is much cheaper.
Can try reset, ATF fluid change, sooner or later valve body or solenoids part change if afflicted with the infamous jerk!
lkm;923578 said:
canuck78
Well-Known Member
Re: Infamous jerk before stop
Should be good for a while, just monitor and see.
Mine works well until one of those go-stop situations or hard stop situations where there'll be a slight thud. It's like those go cannot go, wanna go situation at extremely low speeds the jerk is more apparent, at least on mine.
It almost seems the AT clutch didn't manage to de-couple from the engine fast enough, hence the "jerk", so I would try to gun the gas abit more to reach higher pickup speeds, so won't get the low speed jerks!
Should be good for a while, just monitor and see.
Mine works well until one of those go-stop situations or hard stop situations where there'll be a slight thud. It's like those go cannot go, wanna go situation at extremely low speeds the jerk is more apparent, at least on mine.
It almost seems the AT clutch didn't manage to de-couple from the engine fast enough, hence the "jerk", so I would try to gun the gas abit more to reach higher pickup speeds, so won't get the low speed jerks!
wei1983;923644 said:
Re: Infamous jerk before stop
Just an update. I had my valvebody replaced (together with the solenoids which is part of the valvebody) and the jerks stop
As what one bro mentioned, resetting the adaptation may work for a while but its only a temporary solution if the solenoids are indeed worn out, especially in our kind of traffic conditions. Since I was planning on keeping the car until its ROD date (not Rod from R2D hor), so I decided to have the valvebody replaced.
Now no more anticipating the jerk before stop
Just an update. I had my valvebody replaced (together with the solenoids which is part of the valvebody) and the jerks stop
As what one bro mentioned, resetting the adaptation may work for a while but its only a temporary solution if the solenoids are indeed worn out, especially in our kind of traffic conditions. Since I was planning on keeping the car until its ROD date (not Rod from R2D hor), so I decided to have the valvebody replaced.
Now no more anticipating the jerk before stop
Re: Infamous jerk before stop
Bro, I'm keen to do some programming. I've bought a interface cable from eBay, waiting for it to arrive. Downloaded some Readme docs from BWW coding. Just thinking of programming some changes to the car. May tap on your knowledge and experience. Hope you don't mind
lim_ck;923753 said:
Bro, I'm keen to do some programming. I've bought a interface cable from eBay, waiting for it to arrive. Downloaded some Readme docs from BWW coding. Just thinking of programming some changes to the car. May tap on your knowledge and experience. Hope you don't mind
lkm
Well-Known Member
Re: Infamous jerk before stop
We should start a BMW coding thread.... I got my OBD cable for some time already, buy have not been successful getting INPA to talk to my car.
We should start a BMW coding thread.... I got my OBD cable for some time already, buy have not been successful getting INPA to talk to my car.
redline15;923906 said:Bro, I'm keen to do some programming. I've bought a interface cable from eBay, waiting for it to arrive. Downloaded some Readme docs from BWW coding. Just thinking of programming some changes to the car. May tap on your knowledge and experience. Hope you don't mind
Re: Infamous jerk before stop
Bro, my mileage is 110 but pre-owned so donno when the problem started. Anyway, as canuck78 suggested, if you don't wish to spend too much, just try resetting the EGS first. Otherwise, you may wish to replace the valvebody.
Cheers
gluejuice;923501 said:
Bro, my mileage is 110 but pre-owned so donno when the problem started. Anyway, as canuck78 suggested, if you don't wish to spend too much, just try resetting the EGS first. Otherwise, you may wish to replace the valvebody.
Cheers
Re: Infamous jerk before stop
sure. just make sure you understand the basics first from the readme files. not sure what you managed to find but most of the readme files are very brief so it takes actualy usage to get to know what is going on.
redline15;923906 said:Bro, I'm keen to do some programming. I've bought a interface cable from eBay, waiting for it to arrive. Downloaded some Readme docs from BWW coding. Just thinking of programming some changes to the car. May tap on your knowledge and experience. Hope you don't mind
sure. just make sure you understand the basics first from the readme files. not sure what you managed to find but most of the readme files are very brief so it takes actualy usage to get to know what is going on.
Re: Infamous jerk before stop
check your comm port settings and that the ediabas.ini file has been set up correctly. i would suggest to do a reinstall as it's usually faster and easier than troubleshooting. BTW, there are a few versions of INPA floating around and some do not have the correct files for our cars so it really is to find whatever you can and then try to update the software.
I have set up DIS V57 and INPA to do diagnostics for my car. but some modules can't be read as the software version is wrong for my E90LCI. using INPA, I'm able to check and read some errors (didn't bother to clear them since car still under warranty, let PML sort out the errors), can access the engine module but can't read my transmission module. i ended up using another software to read and reset the adaptations.
lkm;923914 said:
check your comm port settings and that the ediabas.ini file has been set up correctly. i would suggest to do a reinstall as it's usually faster and easier than troubleshooting. BTW, there are a few versions of INPA floating around and some do not have the correct files for our cars so it really is to find whatever you can and then try to update the software.
I have set up DIS V57 and INPA to do diagnostics for my car. but some modules can't be read as the software version is wrong for my E90LCI. using INPA, I'm able to check and read some errors (didn't bother to clear them since car still under warranty, let PML sort out the errors), can access the engine module but can't read my transmission module. i ended up using another software to read and reset the adaptations.
