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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 06-23-2013, 03:17 AM
HeroET HeroET is offline
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What problem is this?

Recently I noticed that when I stopped for redlight for a while, my car starts to shake intermittently and randomly. It feels like I ran over a bump. Sometimes it shakes violently, sometimes its gentle.

This symptom started to happen right after I fill a full tank of shell 91 gas.

Does anyone know what problem it is and what should I do?

It's e90 325xi

Thanks

Last edited by HeroET; 06-23-2013 at 03:39 AM.
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  #2  
Old 06-23-2013, 07:51 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by HeroET View Post
Recently I noticed that when I stopped for redlight for a while, my car starts to shake intermittently and randomly. It feels like I ran over a bump. Sometimes it shakes violently, sometimes its gentle.

This symptom started to happen right after I fill a full tank of shell 91 gas.

Does anyone know what problem it is and what should I do?

As info for diagnosis, your post is slim pickin's.

Try reading codes - get back to us.

Your engine is misfiring, 'bout as specific as we can be at this point.
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  #3  
Old 06-23-2013, 02:21 PM
wiredread wiredread is offline
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Try burning out the gas in your tank and only use 93 octane on your car that is what bmw recommend.
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  #4  
Old 06-23-2013, 02:55 PM
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CarlsonTheFlyer CarlsonTheFlyer is offline
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Quote:
Originally Posted by wiredread View Post
Try burning out the gas in your tank and only use 93 octane on your car that is what bmw recommend.
Actually BMW recommends 91 and higher. And it will actually run OK on 87 or 89 gas. The computer will adjust the timing to compensate for lower octane. You'll have less power and higher fuel consumption, but it will run.

Have your codes read. They will tell the tale. Preferably use the scanner that can read BMW specific codes. The tale will be much more telling. Post the codes here and you'll start to get the idea what's going on.
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  #5  
Old 06-23-2013, 03:14 PM
TXFred TXFred is offline
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Sounds like it's misfiring a bit at idle. Like the others say, it may be the gas.

If you want to look under the hood, I'd check out the air filter. If it's badly clogged, it might cause this sort of behavior.

But I'm just guessing.

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  #6  
Old 06-23-2013, 03:59 PM
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or Vanos solenoid
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  #7  
Old 06-23-2013, 04:01 PM
HeroET HeroET is offline
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Quote:
Originally Posted by wiredread View Post
Try burning out the gas in your tank and only use 93 octane on your car that is what bmw recommend.
Thanks for the advise. But in Bay area there seems no 93. The premium is 91.

The only difference is I fueled at a station that I never been to before.
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  #8  
Old 06-23-2013, 04:03 PM
HeroET HeroET is offline
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Originally Posted by CarlsonTheFlyer View Post
Actually BMW recommends 91 and higher. And it will actually run OK on 87 or 89 gas. The computer will adjust the timing to compensate for lower octane. You'll have less power and higher fuel consumption, but it will run.

Have your codes read. They will tell the tale. Preferably use the scanner that can read BMW specific codes. The tale will be much more telling. Post the codes here and you'll start to get the idea what's going on.
Can you please recommend a good BMW code reader?
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  #9  
Old 06-23-2013, 04:31 PM
riviera1969 riviera1969 is offline
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If ever come by I'm south of Sac in Galt i will check it for you it could be different things
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  #10  
Old 06-23-2013, 04:51 PM
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thekurgan thekurgan is offline
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The fuel may have been bad, but it sounds more like a coil.
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  #11  
Old 06-23-2013, 05:11 PM
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Bemo Bemo is offline
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I had a similar problem, rough idle on cold start. My SA had a similar problem on his leased 328xi and the vanos solenoid replacement did nothing. I got a higher software version and it made the problem go away. He followed with the same and reported good results.
As others have said, we are just guessing at this point. Have the codes read or bring it in to the dealer or a knowledgeable, and well equipped, indy.
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  #12  
Old 06-24-2013, 08:18 AM
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CarlsonTheFlyer CarlsonTheFlyer is offline
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Quote:
Originally Posted by HeroET View Post
Can you please recommend a good BMW code reader?
Bavarian Technic tool, also known as the BT Tool. They are quite pricey though. Check on eBay.

My car is Cobb tuned, so I use my Cobb Access Port to read BMW and generic codes.
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  #13  
Old 07-08-2013, 07:22 PM
HeroET HeroET is offline
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update:

3 days ago, when I got off freeway, the car started to shake like run over a bumpy road, engine light went on, after I stop/start engine, problem gone and engine light went off.

I brought the car to a local shop for diagnose, the error code is 29CD, misfire on cylinder 1. The man swapped coil 1 and 2, ran a few miles, the problem didn't occur anymore but he was expecting another error on cylinder 2 so that it's a bad coil.

Will this 'swap' resolve the issue? Or there maybe more potential issues?

Last edited by HeroET; 07-08-2013 at 07:26 PM.
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  #14  
Old 07-08-2013, 07:44 PM
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sptt144 sptt144 is online now
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Re: What problem is this?

Should happen again. Are those original coils?

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Old 07-08-2013, 08:09 PM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by HeroET View Post
update:

3 days ago, when I got off freeway, the car started to shake like run over a bumpy road, engine light went on, after I stop/start engine, problem gone and engine light went off.

I brought the car to a local shop for diagnose, the error code is 29CD, misfire on cylinder 1. The man swapped coil 1 and 2, ran a few miles, the problem didn't occur anymore but he was expecting another error on cylinder 2 so that it's a bad coil.

Will this 'swap' resolve the issue? Or there maybe more potential issues?
Sounds like it may be intermittent. Whenever I have one bad coil, I usually buy two, chances are another may go bad and you'll have something to replace with right away. Coils can be had cheaper online regardless.
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  #16  
Old 07-08-2013, 08:35 PM
HeroET HeroET is offline
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Yes original ones.

Quote:
Originally Posted by sptt144 View Post
Should happen again. Are those original coils?

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  #17  
Old 07-08-2013, 08:49 PM
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Re: What problem is this?

Take it to the dealer. There is a tsb and you can get them replaced under warranty due to old coils being faulty. Got new injectors and coils at 35k.

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  #18  
Old 07-09-2013, 08:20 AM
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Quote:
Originally Posted by thekurgan View Post
Sounds like it may be intermittent. Whenever I have one bad coil, I usually buy two, chances are another may go bad and you'll have something to replace with right away. Coils can be had cheaper online regardless.
Good advice, but I'd almost just go ahead and replace all at that point. Once one goes they generally all go pretty quickly. If you plan to keep the car, might as well get it done while you are not stranded somewhere.
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Old 07-09-2013, 10:23 AM
fdriller9 fdriller9 is online now
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Quote:
Originally Posted by SilverX3 View Post
or Vanos solenoid
Yea my money is on the vanos solenoids.

They are easy to access and remove. They are right in the front of the engine when you look into the engine bay. You have to remove the engine cover to get better access but you can see then without remove it.

They're held in by 8mm screws I believe. Remove the intake and exhaust solenoids and blow compressed air through them. Some people use gasoline or brake cleaner, but I've only used air.

If they keep sticking or are mechanically jambed (DME will tell you so if you have a BMW specific fault scanner), they will need to be replaced.
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Old 07-09-2013, 10:26 AM
fdriller9 fdriller9 is online now
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Well I think it's obvious I didn't read the whole thread before I posted that last one....
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  #21  
Old 07-09-2013, 11:10 AM
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Quote:
Originally Posted by fdriller9 View Post
Yea my money is on the vanos solenoids.

They are easy to access and remove. They are right in the front of the engine when you look into the engine bay. You have to remove the engine cover to get better access but you can see then without remove it.

They're held in by 8mm screws I believe. Remove the intake and exhaust solenoids and blow compressed air through them. Some people use gasoline or brake cleaner, but I've only used air.

If they keep sticking or are mechanically jambed (DME will tell you so if you have a BMW specific fault scanner), they will need to be replaced.
OP has zero symptoms related to the solenoids, his issues are at idle and coming to idle.
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Old 07-09-2013, 11:21 AM
fdriller9 fdriller9 is online now
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When my solenoids were sticking, they caused sporadic idle but that's besides the point. It looks like he got his issues sorted out.
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Last edited by fdriller9; 07-09-2013 at 11:22 AM.
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  #23  
Old 07-09-2013, 11:23 AM
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Re: What problem is this?

Use 87 after this tank full if you.don't find a change our pinpoint the problem. If out goes away, its your vanos getting stuck.

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Old 07-09-2013, 11:35 AM
Ultimate_drivin Ultimate_drivin is offline
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Do not use 87 gas that should never be in ur mind use bottle of injecter cleaner Any brand u want and fill up ur tank u should be good to go I did this to my cousins bmw and problem gone ur injectors are clogged
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  #25  
Old 07-09-2013, 01:36 PM
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Re: What problem is this?

I meant 89! Sorry (does anyone even have 87 gas anywhere anymore?). I read that if it solves the issue, it is a timing problem with the solenoids. So sorry!

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