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post #1 of 7 (permalink) Old 05-19-2017, 08:23 PM Thread Starter
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Car Running Rough

Okay, asking for some help here guys!

So I changed my alternator, and I f'ed up because I must not screwed the electrical connector in incorrectly, because soon after starting my car, the engine shut off and there was a small cloud of white smoke. I took everything back apart and noticed a small burn on the alternator, and some of the plastic melted away. I took the alternator back to Auto Zone, and lucky for me the guy let me exchange it for a new one and charged my battery. Re-installed everything and made sure I screwed the metal connector in correctly this time. Started the car up, and everything seemed fine, but noticed the car seemed to run a bit rough. Tried driving it up the street and quickly turned around because I got almost no power. Somethings not right. Can someone help me and maybe point me to what I f'ed up and what I can do to fix it? I hope I didn't mess up my engine.

Could it be an issue with my spark plugs? Maybe thery got missed up with the car shutting off? I have a 2004 X5, V8 4.4
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post #2 of 7 (permalink) Old 05-27-2017, 06:10 PM
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Get a pro

I wish I could be of help but history has shown the BMW can be a little tricky to fix on your own. I would say find a pro before things get out of hand.
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post #3 of 7 (permalink) Old 07-12-2017, 02:25 AM
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As eric said, you should consult with an expert, but car running rough is a powertrain issue.
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post #4 of 7 (permalink) Old 07-27-2017, 01:57 PM
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006 525I BMW rough running

Hi
Had the problem twice for rough running engine and poor power. I have replace the problem ignition coils on the spark plugs. Quite eazy to do just undo the coil at the plugs. When the engine does not change in idling that is the problem coil. Hope this helps
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post #5 of 7 (permalink) Old 10-31-2018, 09:49 PM
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Ignition coil?

What is the readout from your auto diagnostic scan? Autozone will retrieve the code for free with their diagnostic meter. BTW, the diag plug is usually located next to the hood release lever under the steering column. When my engine was running rough with less power, my #1 ignition coil was failing. I replaced all the coils and plugs since the car was above 65K. Voila. The engine performed strongly as new. See my detailed DIY post from Bimmerfest, post #71.

Last edited by beefrank; 10-31-2018 at 10:15 PM. Reason: Add Title
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post #6 of 7 (permalink) Old 10-31-2018, 10:56 PM
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VCG, ignition coils and plugs Replacement DIY

You can reference my ignition coil change DIY on Bimmerfest.
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post #7 of 7 (permalink) Old 05-18-2019, 06:28 AM
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thanks for sharing
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