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      10-21-2014, 03:25 PM   #1
E90M3velocity
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engine dying

Engine is going into limp mode, dies, and gives out an "increase emissions" message. I try to restart it and it sounds like its running rough, eventually starts sounding normal with limp mode still activated. It keeps shutting off so i cant even bring it to my shop. I have no more warranty so it seems im pretty fucked, but does anyone have a rough idea what it could be? Trying to prepare for the worst.
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      10-21-2014, 03:51 PM   #2
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Can you scan the car and post the codes stored in the DME ?
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      10-21-2014, 04:05 PM   #3
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Throttle actuator? SCAN IT!! easy to fix if that's it
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      10-21-2014, 04:20 PM   #4
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If it's shutting off it's probably not a throttle actuator - sounds like a bad crank sensor to me.
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      10-21-2014, 06:09 PM   #5
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Faulty idle control valve?? Faulty O2 sensor maybe ?? I am no mechanical expert ... Just thinkin out loud re the common issues with this motor ...
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      10-21-2014, 07:42 PM   #6
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Check engine lights? You have the codes??

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      10-21-2014, 08:07 PM   #7
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Stalling is likely an idle control valve issue. Codes are needed to know for sure though.
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      10-21-2014, 09:20 PM   #8
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It's all a stab in the dark until he gets the codes read.
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      10-21-2014, 09:32 PM   #9
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Quote:
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It's all a stab in the dark until he gets the codes read.
This.
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      10-21-2014, 10:04 PM   #10
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Sounds like rod bearings to me
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      10-21-2014, 10:06 PM   #11
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Sounds like rod bearings to me
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      10-22-2014, 08:28 AM   #12
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Im going to have to get it towed to the shop later today to pull the codes, just wondering someone out there experienced this problem. Its not throttle actuators as they are new. I'll ask the shop to check the crank sensor, thanks mike.
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      10-23-2014, 08:35 PM   #13
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My shop couldnt find a definite solution even dealing with the tech info from autologic. They did reset the ecu adaptations and it drives really good now and better than it did before these problems manifested. No limp mode or engine stalls on the way home. I do have a persistent error code for the map sensor (i had it for last two times i pulled codes after going into limp mode), which they ordered one just in case it happens again. Here are the error codes for people wondering-
CDB7 (Had edc coded out)
27AB- charge plausibility, diagnosis hot - bank 2
27AA- charge plausibility, diagnosis hot - bank 1
2738- charge plausibility, diagnosis, cold-start strategy, bank 2
2B0D- idle actuator monitoring, bank 1
2714- intake-manifold pressure sensor
2B29- moment manager monitoring
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      10-27-2014, 11:04 AM   #14
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Well it didnt fixed it! It went into limp mode this morning with dsc malfunction so i turned it off and started it back up. Ran rough like it did before.
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      12-29-2014, 04:07 PM   #15
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Well its been over a month since i replaced the map sensor and it ran fine. Until last week i got the same symptoms. I pulled the codes today and i got the same error codes as before. I changed the idle control valve and the map sensor already and i am lost on what to do.
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      12-29-2014, 04:35 PM   #16
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Quote:
Originally Posted by E90M3velocity View Post
Well its been over a month since i replaced the map sensor and it ran fine. Until last week i got the same symptoms. I pulled the codes today and i got the same error codes as before. I changed the idle control valve and the map sensor already and i am lost on what to do.
BMW/Dealer .
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      12-29-2014, 04:51 PM   #17
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Quote:
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BMW/Dealer .
No warranty and i trust my shop more than the dealers near me. I had bad experience with some of them. Guessing the problem or not even installing parts correctly.
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      12-29-2014, 06:13 PM   #18
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Quote:
Originally Posted by E90M3velocity View Post
No warranty and i trust my shop more than the dealers near me. I had bad experience with some of them. Guessing the problem or not even installing parts correctly.
Indeed, the reputation of most are
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