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#1
01-19-2014, 09:55 PM
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Rough idle in cold weather.
So here I am again with yet another problem on the loveable 4.8...
 I've read some old threads on this but I'm just not convinced yet. When I start up in the morning in cold weather the idle is rough and it shakes the whole truck but if I rev up slightly it runs perfectly. It only lasts until I drive away or if I rev up a little then it goes back to normal. I'm sure some of you experienced something similar...
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His : 2005 X5 4.8is (SOLD) Hers: 2007 X5 3.0si (SOLD) _______________ Retired: 1999 518 2000 323i 2002 M3 (beautiful car) 2003 330Ci 
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#3
01-20-2014, 08:12 AM
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 Check out Part 13 on each side of the Valve covers. If these diaphragms are boogered up with cheese or torn, it will give you rough idle when cold. I had the same problem... Replaced them, and problem no more.
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2011 E70 50i M Sport Exterior: Alpine Weiss III Interior: Nevada PACKAGES: . 
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#4
01-20-2014, 10:10 AM
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I'll investigate both suggestions. Thx
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His : 2005 X5 4.8is (SOLD) Hers: 2007 X5 3.0si (SOLD) _______________ Retired: 1999 518 2000 323i 2002 M3 (beautiful car) 2003 330Ci
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#5
01-20-2014, 10:22 AM
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I get this rough idle on cold morning occasionally too. Generic OBD scanner gives me a Cylinder 1 misfire. The first few times it gave Random Cylinder Misfire and the light would flash. Now the light will come on steady and give me the Cylinder 1 code. Plugs are new, I've swapped around the coil packs and the same issue remained. Shut the car off, restart and it runs like a top and the SES light goes off a few miles down the road.
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Current Bimmer 2004 X5 4.4i Sterling Grey Sport/Premium Past Bimmers 1991 318I Alpine White 1995 740I Alpine White 1991 525I Schwartz 1998 323IS Scwartz 2004 330CI Cabrio Titanium Silver Metallic 1995 540I Schwartz 2000 Z4 3.0 Titanium Silver 2000 330ci Coupe Titanium Silver
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#6
01-20-2014, 10:31 AM
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Check that diaphragm
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2011 E70 50i M Sport Exterior: Alpine Weiss III Interior: Nevada PACKAGES: .
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#7
01-20-2014, 10:39 AM
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Quote:
__________________
His : 2005 X5 4.8is (SOLD) Hers: 2007 X5 3.0si (SOLD) _______________ Retired: 1999 518 2000 323i 2002 M3 (beautiful car) 2003 330Ci
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#8
01-20-2014, 10:39 AM
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Will give a look today.
__________________
Current Bimmer 2004 X5 4.4i Sterling Grey Sport/Premium Past Bimmers 1991 318I Alpine White 1995 740I Alpine White 1991 525I Schwartz 1998 323IS Scwartz 2004 330CI Cabrio Titanium Silver Metallic 1995 540I Schwartz 2000 Z4 3.0 Titanium Silver 2000 330ci Coupe Titanium Silver
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#9
01-20-2014, 10:55 AM
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They can be cleaned so long as the spring is still ok and the diaphragm doesn't have a tear in it... Otherwise, they are cheap enough to fix. PN 11127547058
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2011 E70 50i M Sport Exterior: Alpine Weiss III Interior: Nevada PACKAGES: .
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#10
01-20-2014, 11:27 AM
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Thx bro
__________________
His : 2005 X5 4.8is (SOLD) Hers: 2007 X5 3.0si (SOLD) _______________ Retired: 1999 518 2000 323i 2002 M3 (beautiful car) 2003 330Ci
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2003 bmw x5 3.0i ,219000km build date 2003-08-18
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