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BMW 3-Series (E90 E92) Forum
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Car Stumbles at Idle
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03-19-2013, 10:18 PM | #1 |
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Car Stumbles at Idle
Hey all,
So my car has an AP and DCI. I replaced the plugs at my last oil change. Often times at idles there is a sort of stumble in the RPMs. I'm not throwing any codes according to my AP. Is this a normal N54 thing or something I can fix? Thanks in advance for any and all help!
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03-20-2013, 05:01 PM | #3 |
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I think my friend has the same problem, shoot him a PM. He's on my friends list, its OmidHariri.
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03-20-2013, 05:49 PM | #6 | |
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having the same problem... Did a full service on the car a few weekends ago to make sure everything was good.... Intake Valve cleaning are next!!
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03-20-2013, 05:57 PM | #8 |
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Clean your MAF sensor and replace air filter. It does not hurt...
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03-20-2013, 06:02 PM | #9 |
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404: MAF NOT FOUND
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03-20-2013, 06:07 PM | #10 |
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03-20-2013, 06:16 PM | #11 | |
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Was being an asshole. OP has 335i. No MAF. Quote:
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03-20-2013, 06:21 PM | #13 |
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03-20-2013, 06:25 PM | #14 |
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03-20-2013, 08:19 PM | #15 |
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03-21-2013, 01:23 AM | #17 |
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I guess I'll try walnut blasting. The car just rolled 35k miles! She's still brand new! haha
I supposed I could check the coils as well. Could it be the tune? If the car was in fact missing would it throw a code? Thanks!
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03-21-2013, 01:29 AM | #18 |
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A dealer-done walnut shell blast is going to cost around $800. Consider just borescoping the valves or even one weekend open the top-end up and eyeball things if you can.
35k miles is pretty low for having a bad case of carbon fouling. Not saying impossible, but unusual I think. Unless maybe you've got a tune (don't answer this).
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03-21-2013, 07:56 AM | #19 |
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I have the same issue. Sputtering and stalls. I don't have a warranty at the moment but check these out. Replace your camshaft sensor if you have one (I have a 325). It's relatively inexpensive. 40$ and labor. After, check your fuel pumps including the dtml emissions pump. Might need replacement. Mine does but I can't do shit because I don't have a warranty...
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03-21-2013, 08:14 AM | #20 |
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03-21-2013, 08:33 AM | #21 |
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I replaced my air filter back in December and I get the same thing. I have a 328i and it stumbles for the first 10 seconds or so when starting up then runs smooth. On warm days I haven't noticed it. My gas mileage has been shot to hell too. I was averaging 26-27 MPG before that and not I'm getting anywhere from 21-23. I've had it less than a year though, so I guess it could just be the cold weather... I'm going to look into it more when it gets warmer if it doesn't get better.
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03-21-2013, 10:21 AM | #22 | |
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