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E28 (1982 - 1988)

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  #1  
Old 12-30-2011, 03:59 AM
ma mama car ma mama car is offline
moms old beemer
Location: oakland, ca.
 
Join Date: Apr 2011
Posts: 5
Mein Auto: 1989 525I
89 525I weird idle

my mom gave me this 89 525I i love it it runs great but recently its been acting funny,i stopped at the gas station put in fuel pulled away,all of a sudden the engine cuts out like it was out of gas started it up no prob.Ten minutes later it starts idling rough like its gonna dye but then after a minute or so smooths out smells like gas then runs fine,keeps doing that every ten minutes or so now it has a hard time starting when it finally does it idles rough then smooths out WHAT IS IT ?
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  #2  
Old 12-30-2011, 04:23 AM
south26 south26 is offline
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Location: Dayton, OH
 
Join Date: May 2009
Posts: 773
Mein Auto: 535i 1989
I would suggest posting in the correct sections. You have an e34 not an e28.


Andy
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  #3  
Old 01-02-2012, 04:02 AM
brooklyn naylor brooklyn naylor is offline
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Location: queensland
 
Join Date: Mar 2011
Posts: 9
Mein Auto: 1987 525e bmw
Check your air intake hose for any cracks or leaks mine did the same thing! Although mine is an e28 yours may have a similar vacuum system. If there is any unneeded air coming in to the vacuum system the engine will shut off to avoid damage because the air intake sensor releases the air to fuel ratio is incorrect and may damage your engine. Also there should be a little screw on top of the exterior engine head, tweak that with a screw driver only a millimeter and your idle will be smooth as a whistle. Also check that your cables on your battery terminals are righted properly. Any disturbances to the vacuum will cut out the engine for safety. Check the seal on your oil cap, dipstick/ oil stick, air intake hose. Good luck!
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  #4  
Old 01-04-2012, 11:43 AM
jimoreno jimoreno is offline
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Location: Parsippany, NJ
 
Join Date: Jul 2006
Posts: 487
Mein Auto: 2006 X3
You might have a dead or dying fuel pump and/or a dirty fuel filter. Replace the filter first, look at the fuse and relays (cheap options first) and if that doesn't work replace the pump.
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1986 535i
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