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2001 BMW 525i rough engine at low idle

Tiny
KEN0007
  • MEMBER
  • 2001 BMW 525I
Shakes or Wobbles problem
2001 BMW 525i

Think I had some bad gas in my tank last week.
it just started to idle very rough bearly taking off,
changed the fuel filter and finished the bad gas.
however it is almost the same. How long does it take to get the whole thing out of system. What else I should be looking into? Had it scanned at it showed missfire on the 3-4 injections randomely.
any idea?

Thanks
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Thursday, June 17th, 2010 AT 11:51 AM

4 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Clear out the faults and keep driving, it may take one or two complete tankfuls. If not then there may be an issue with another component. Is there a check engine light on?
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Saturday, June 19th, 2010 AT 10:23 AM
Tiny
KEN0007
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Thanks Dr.
The check engine light is on, it has been going on and off for a while. Someone told me that it could be a Breathing Valve? Since it seems to be a regular problem in this type of BMW engine.
The plugs have been checked, one is not working at all and two are working in a 50% capacity.
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Saturday, June 19th, 2010 AT 2:57 PM
Tiny
DOCHAGERTY
  • MECHANIC
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The oil separator valve could be the cause.
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Saturday, June 19th, 2010 AT 11:49 PM
Tiny
KEN0007
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Thanks, I'll have it checked for the oil seperator valve also.
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Sunday, June 20th, 2010 AT 10:13 AM

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