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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > 335 feels a bit "shaky" on idle



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      01-27-2012, 07:10 AM   #1
335tim
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335 feels a bit "shaky" on idle

I hope I haven't got a problem already here but my 335 seems to feel a bit shaky on idle. I wouldn't go so far as to say it has a "rough" idle but I can definitely feel little shakes while sitting in traffic. The rev needle doesn't move at all so it's nothing major but it's annoying me.

Any experience of this ideas?

Last edited by 335tim; 01-27-2012 at 09:43 AM.
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      01-27-2012, 07:13 AM   #2
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http://www.e90post.com/forums/showthread.php?t=509274

Have a look at the above.

Many people report the same issue.
How to fix it? I just give it a bit of the loud pedal.
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      01-27-2012, 09:17 AM   #3
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Thats just the experience I had with my 320i, a number of things were replaced including coils plugs injectors etc.
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      01-27-2012, 09:20 AM   #4
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Mine is a tiny bit 'shakey' as well but to notice it I have to turn the sereo on mute and concentrate. I put it down to their being a big engine with explosions happening in side it 3 feet in front of me. Or should I be worried as well?
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      01-27-2012, 09:29 AM   #5
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335i has a rough idle. You could spend thousands trying to fix it to no avail..
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      01-27-2012, 09:31 AM   #6
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Quote:
Originally Posted by 335iLondon View Post
http://www.e90post.com/forums/showthread.php?t=509274

Have a look at the above.

Many people report the same issue.
How to fix it? I just give it a bit of the loud pedal.
Does the "loud pedal" fix it then?

How soon does it come back after that?
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      01-27-2012, 09:32 AM   #7
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Quote:
Originally Posted by phil200tdi View Post
335i has a rough idle. You could spend thousands trying to fix it to no avail..
If thats the case, thats fine. Its not a problem as such, its just a bit annoying and i spose im being a bit over the top as its a new car to me.

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      01-27-2012, 09:43 AM   #8
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Quote:
Originally Posted by 335tim View Post
Does the "loud pedal" fix it then?

How soon does it come back after that?
It only occurs on idle.
so give it a bit of throttle and should be fine.

My unfounded speculation is a weakness in either fuel pump or ecu managment of idle rpm.

Either way, the car is not happy at 600rpm, but is fine after 700 or so.
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      01-27-2012, 09:51 AM   #9
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I'm sure it is normal to be able to feel that the car is running? If it really is shakey or hunting for idle then maybe start worrying.

I came from an RX8. If you want to feel a rough idle that is basically described by any dealer as a 'feature of the car' then look no further. I had to close the window at the lights for fear of being thrown out! With the belt on!
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      01-27-2012, 09:59 AM   #10
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Quote:
Originally Posted by nicktyler
I'm sure it is normal to be able to feel that the car is running? If it really is shakey or hunting for idle then maybe start worrying.

I came from an RX8. If you want to feel a rough idle that is basically described by any dealer as a 'feature of the car' then look no further. I had to close the window at the lights for fear of being thrown out! With the belt on!
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      01-27-2012, 12:14 PM   #11
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I like the little kicks and the odd jiggle from the N54 at idle, reminds you what's under the bonnet

It's a performance car, not a limo.
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      01-27-2012, 12:15 PM   #12
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Quote:
Originally Posted by doughboy View Post
I like the little kicks and the odd jiggle from the N54 at idle, reminds you what's under the bonnet

It's a performance car, not a limo.
Haha, fair play.
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      01-27-2012, 01:28 PM   #13
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mine shaked on startup and sometime on idle and it was running rough

i though it was plugs or coils which i replaced to no effect ,but it was the vanos soleniods ,i replaced the inlet and its not shaked since

now i'm not saying thats whats wrong with yours ,i think these engines just dont idle right if theres something alittle bit wrong and its causes a shake on idle ,I'd get the usual diagnostic tests done they should be able to find it
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      01-27-2012, 05:59 PM   #14
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Quote:
Originally Posted by 335tim View Post
Any experience of this ideas?
It's worth checking to see if it has had the injector recall work done.

My idle on a cold start gradually got worse over a few months until a couple of days before it was due for the recall work it started on 5 cylinders.

The replacement injectors cured the cold idle issues. It's just a shame that it started misfiring at over 2.5k rpm immediately after collecting it from the dealer following the work...
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      01-27-2012, 08:12 PM   #15
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Quote:
Originally Posted by nicktyler View Post
I came from an RX8. If you want to feel a rough idle that is basically described by any dealer as a 'feature of the car' then look no further. I had to close the window at the lights for fear of being thrown out! With the belt on!
I also came from an RX-8. I'd seen the rough idle discussed on forums but never suffered from it myself.
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      01-28-2012, 05:51 PM   #16
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Quote:
Originally Posted by Sandwich_Dan View Post
It's worth checking to see if it has had the injector recall work done.

My idle on a cold start gradually got worse over a few months until a couple of days before it was due for the recall work it started on 5 cylinders.

The replacement injectors cured the cold idle issues. It's just a shame that it started misfiring at over 2.5k rpm immediately after collecting it from the dealer following the work...
Have the plugs been out / replaced?
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      01-29-2012, 05:43 PM   #17
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Just had this.

29CF code logged.

Misfire on 3.

Replaced the coilpack - good as new
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      02-03-2012, 01:51 PM   #18
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Ok guys, may be paranoid but I'm pretty sure the shakes are now worse and it doesn't feel normal.

However, it's only on idle. Still drives fine and pulls like a train when need be. What could cause this? Software, spark plugs, fuel pump?

Help me plsssssss.
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      02-03-2012, 02:14 PM   #19
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Doing a search and thinking maybe its something like this:

http://www.e90post.com/forums/showth...ght=rough+idle
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      02-03-2012, 05:10 PM   #20
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Quote:
Originally Posted by m1bjr View Post
Have the plugs been out / replaced?
Well Tim... this is why I asked this >>>
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      02-03-2012, 05:37 PM   #21
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I'm pretty sure a lot of petrol cars from various manufacterers suffer from this and its usually one of the coilpacks, as m1bjr has already mentioned.
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      02-04-2012, 02:36 AM   #22
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Quote:
Originally Posted by m1bjr View Post
Well Tim... this is why I asked this >>>
Sorry, didnt realise you were asking me. Answer is, I dont know. Only had the car a couple of weeks. Cant see any record of plugs being replaced. Thing is, I dont wanna pay for diagnostics without knowing what may be wrong (dont really trust dealers). I may take it to my independant mechanic and see what he thinks first.
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