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#11
01-02-2012, 11:11 AM
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Open the hood and check the bay on the left side for loose boots from air filter housing through MAF to the middle of the engine where the throttle body is. It takes less than 2 minutes to execute. Quote:
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e53 '00 4.4i Oxford Green II Freshly rebuilt tranny(2nd one) and transfer case/front shaft e70 '08 3.0si Sapphire Black cinnamon leather 7 seats e61 '06 530XI Sports Touring Silver - SOLD 
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#12
03-29-2012, 08:39 PM
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valve body...these cars are known for this.
dirty valve body...metal flakes inside. when car warms up tranny fluid goes up leaving metals to linger into valve body guides. youll sometimes notice a hard knock from 2-1st gear. buy a rebuilr valve body / filter / seal and do it yourself in an hour. valve bodies cost about 450us with 250 core charge.
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#14
03-30-2012, 08:28 AM
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Yes,I've read it in some of the older posts,but I haven't changed spark plugs and have no lurch at all after a valve body rebuild,but,as I wrote earlier in this thread,I had a loose intake boot when it was lurching like S.O.B.
Quote:
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e53 '00 4.4i Oxford Green II Freshly rebuilt tranny(2nd one) and transfer case/front shaft e70 '08 3.0si Sapphire Black cinnamon leather 7 seats e61 '06 530XI Sports Touring Silver - SOLD
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#15
04-01-2012, 12:22 PM
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I have the same lurch in my 2003 4.6is in stop and go traffic. In sport mode, there seems to almost be no lurch bc there appears to be more of a rev matching going on esp in 2-1 shifts. Therefore, in traffic I drive in sport, not auto and not manual. Also, when the ac is on the lurch seems relatively muted but not as when in sport mode. Anyone else have this with their x?
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#16
04-02-2012, 07:28 PM
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I also have the same problem, seeking a fix for this, ..... winter the x have no lurch problems because it cold outside, as the weather gets warm the lurching starts up again... what if its the transmission cooler the problem... i thinking about add transmission cooler keep the tran oil from getting to hot.... is this a good idea.....
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#17
04-02-2012, 10:09 PM
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Quote:
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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#18
04-03-2012, 04:33 PM
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Check your maf it works off reading temp changes in the air...
Also Cold or hot outside under normal operating conditions parts will get to the same temp. Like boil eggs inside or outside in the winter you'll still get the water just as hot just may take 3mins more... Just disconnect your maf and drive it for a day it'll put your ecu into default air fuel mixture...if it doesn't lurch you know it's that. No one can give you a solid answer here we can only point you in a direction Happy hunting and good luck.
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