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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 04-28-2014, 04:50 AM
benmcelhaney benmcelhaney is offline
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Mein Auto: 2007 328xi, 2008silverado
07 328xi slipping and Service Engine Soon light

Hey everyone. I've got a 2007 328xi with just about 140K miles on it. It is my wifes car, and she complained about a week ago that it was kind of jerky when she accelerated. She drove it for a few days before I could take it out for a spin.

When I drove it, i noticed the jerking also. It was very light, almost like a misfire but i cant tell if its misfiring or if its the transmission slipping.

She then took it out shopping and said that it lost a lot of power and the service engine soon light came on. i told her to put it in manual mode and downshift to try to get more power. she did that and the service engine soon light went off and the car no loger jerked.

I drove it to work today with a code reader with me. I aslo had the same problem happen to me, but before i could pull into a parking lot to check the code the service engine light went off and the car was acting OK (aside from some light slipping or misfiring).

Any suggestions?
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  #2  
Old 04-28-2014, 05:09 AM
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Zooks527 Zooks527 is offline
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Quote:
Originally Posted by benmcelhaney View Post
Any suggestions?
Pull the codes with a BMW specific code reader (i.e.: http://bavariantechnic.com/). There are a number of shadow codes and non-light codes that can be set and that won't be visible to a generic code reader.

Post any codes that may be found.
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Old 04-28-2014, 08:03 AM
benmcelhaney benmcelhaney is offline
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Ok i'll have to order one and once it comes i'll post the codes.
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Old 05-01-2014, 03:31 AM
benmcelhaney benmcelhaney is offline
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While i'm still waiting for the code reader to show up, this morning i went to the gas station and filled up her car. The SES light went out and the car seemed to run a LOT better. There is still some very light slipping or misfiring if you try to accelerate hard at low RPM's, but it is not as bad as before i got gas.

Could bad gas have caused the issue? just a thought.
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Old 05-06-2014, 12:18 PM
benmcelhaney benmcelhaney is offline
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Here is what i got.

P0301 MOD $12
Cylinder 1 Misfire
Detected
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  #6  
Old 05-06-2014, 12:29 PM
Watchme Watchme is offline
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Misfiring does not explain a slipping transmission - unless it's not slipping.
I would get the hidden BMW codes.
Filling gas tank alleviates issues, maybe a fuel pump issue. As you have more head due to fuel level on the pump suction side.

Last edited by Watchme; 05-06-2014 at 12:30 PM.
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Old 05-06-2014, 01:46 PM
jburke4689 jburke4689 is offline
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So then you either have a bad spark plug or coil or injector on cylinder number one.

When did you change the plugs last. It should have been at 90K miles. Switch your #1 and #2 plug. If you P0302 shows up you have a bad plug.

If that doesn't change the code then switch the coils between 1 and two.

If that doesn't change the code you have an issue with the injector.

My bet is the coil. Make sure to check the spark plug holes for oil. If you valve cover gasket is leaking into the spark plug well that can cause the coil to fail.
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Old 02-16-2015, 05:29 AM
benmcelhaney benmcelhaney is offline
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This was a while ago, but i ended up changing all of the spark plugs and ignition coils. Solved the problem. I tried replacing just one plug/coil at a time, but then I would get a code that another one was bad. So i just ripped them all out and changed them all at the same time.

Thanks everyone.
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Old 02-16-2015, 08:17 AM
fdriller9 fdriller9 is online now
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I replied to your other thread. Sounds like a failing ESS.
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Old 02-16-2015, 08:25 AM
Easy Rhino Easy Rhino is offline
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Quote:
Originally Posted by benmcelhaney View Post
This was a while ago, but i ended up changing all of the spark plugs and ignition coils. Solved the problem. I tried replacing just one plug/coil at a time, but then I would get a code that another one was bad. So i just ripped them all out and changed them all at the same time.

Thanks everyone.
A failed coil pack for one cylinder would have been my guess, as this is a common problem with these cars, and your symptoms matched what we saw on my wife's 328i.

You were wise to swap them all out, IMHO, as ours were failing one at a time and being replaced under warrantee individually until my wide pointed out to the dealer that it would be cheaper for BMW to change all the rest at one time.
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