E90 - problem again
- Thread starter wt_know
- Start date
Re: E90 - problem again
you may want to check and replace the spark plug or theey calle dit ignition coil, i forgot...
if you want, i can PM U the workshop to get them replaced. It's 4 pieces to replace at once.
The issue of jerking may be due to misfire and/or loss of power due to wea and tear of them.
you may want to check and replace the spark plug or theey calle dit ignition coil, i forgot...
if you want, i can PM U the workshop to get them replaced. It's 4 pieces to replace at once.
The issue of jerking may be due to misfire and/or loss of power due to wea and tear of them.
wt_know
Well-Known Member
Re: E90 - problem again
ok ... this is the similar problem that i got
in the video it's 'P' mode ... for my case 'P' mode steady poon pi pi ... sibei stable
but in 'D' mode (waiting @ traffic light) ... the rpm drop 100 and then up 100
probably MAF sensor dirty liao
[video=youtube;G9VERqV3s7Y]http://www.youtube.com/watch?v=G9VERqV3s7Y[/video]
ok ... this is the similar problem that i got
in the video it's 'P' mode ... for my case 'P' mode steady poon pi pi ... sibei stable
but in 'D' mode (waiting @ traffic light) ... the rpm drop 100 and then up 100
probably MAF sensor dirty liao
[video=youtube;G9VERqV3s7Y]http://www.youtube.com/watch?v=G9VERqV3s7Y[/video]
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wt_know
Well-Known Member
Re: E90 - problem again
i changed spark plug to bmw original just to be very sure not caused by aftermarket plug. still the same problem. yes, the fluctuation is minor and the car still drive perfectly no lack of power and smooth. but, i wonder what is the problem.
detach8;968674 said:
i changed spark plug to bmw original just to be very sure not caused by aftermarket plug. still the same problem. yes, the fluctuation is minor and the car still drive perfectly no lack of power and smooth. but, i wonder what is the problem.
wt_know
Well-Known Member
Re: E90 - problem again
so for your case you live with it?
your case of rpm fluctuation happen in 'P' and 'D' mode?
my case is abit strange
'P' mode no fluctuation
'N' mode fluctuate tiny bit (did not feel the feedback but can see the rpm fluctuate and lesser)
'D' mode problem ... fluctuate every few secs ... can feel the feedback in brake and steering
so for your case you live with it?
your case of rpm fluctuation happen in 'P' and 'D' mode?
my case is abit strange
'P' mode no fluctuation
'N' mode fluctuate tiny bit (did not feel the feedback but can see the rpm fluctuate and lesser)
'D' mode problem ... fluctuate every few secs ... can feel the feedback in brake and steering
detach8;968723 said:
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Re: E90 - problem again
For dirty injectors, no harm try a dose of Redline SI-1 Fuel System Cleaner , one of the better fuel injector cleaner around.
I used used it frequenlyt for all my past ride and current 06 320i (milage ~145k) at every 20k interval.
It only cost $16 per bottle.
detach8;968723 said:
For dirty injectors, no harm try a dose of Redline SI-1 Fuel System Cleaner , one of the better fuel injector cleaner around.
I used used it frequenlyt for all my past ride and current 06 320i (milage ~145k) at every 20k interval.
It only cost $16 per bottle.
Re: E90 - problem again
Hi Guys
Can I know any of you all solve the issue? I am having the same problem. Have changed the spark plugs, valvetronic motor, updated the software and etc… The problem still persists. If you all have solve the issue, could you all tell me what is wrong and where did you all get it fixed?
Hi Guys
Can I know any of you all solve the issue? I am having the same problem. Have changed the spark plugs, valvetronic motor, updated the software and etc… The problem still persists. If you all have solve the issue, could you all tell me what is wrong and where did you all get it fixed?
Red_Bean_Bun
Well-Known Member
Re: E90 - problem again
No point guessing - plug the diagnostic machine in and pull the error codes out then see how.
No point guessing - plug the diagnostic machine in and pull the error codes out then see how.
wt_know
Well-Known Member
Re: E90 - problem again
previously, error codes were "misfiring". car rocking like siao. very obvious ignition coil up lorry.
1. change ignition coil (4x)
2. change plug (4x)
- 1st change aftermarket nology plug
- 2nd change to bmw original after i complain rpm fluctuate
reinstall coil and plug. the 2nd time before leaving workshop, test and re-test, check and re-check with diagnostic machine = no error code. start car, drive 1 round from workshop, drive like pussy with rpm 1k-2.5k without sudden rev and stop, rpm steady and no fluctuation or at least fluctuation is very gentle and less.
once drive normally like rpm 1k-4k and sudden rev up and brake, when stop at traffic light, fluctuation resume.
+- 100 rpm (down 1 marker, up 1 marker) between 800rpm (steady) to 700rpm ...
engine still performing well and no lack of power.
like detach suggesting, probably have to live with it liao.
4 years old 80,000 milleage no more UDM liao ... sianz
UDM used by date is 4-5 year / 100k milleage whichever comes first ...
previously, error codes were "misfiring". car rocking like siao. very obvious ignition coil up lorry.
1. change ignition coil (4x)
2. change plug (4x)
- 1st change aftermarket nology plug
- 2nd change to bmw original after i complain rpm fluctuate
reinstall coil and plug. the 2nd time before leaving workshop, test and re-test, check and re-check with diagnostic machine = no error code. start car, drive 1 round from workshop, drive like pussy with rpm 1k-2.5k without sudden rev and stop, rpm steady and no fluctuation or at least fluctuation is very gentle and less.
once drive normally like rpm 1k-4k and sudden rev up and brake, when stop at traffic light, fluctuation resume.
+- 100 rpm (down 1 marker, up 1 marker) between 800rpm (steady) to 700rpm ...
engine still performing well and no lack of power.
like detach suggesting, probably have to live with it liao.
4 years old 80,000 milleage no more UDM liao ... sianz
UDM used by date is 4-5 year / 100k milleage whichever comes first ...
Red_Bean_Bun;968862 said:
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