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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

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  #1  
Old 02-06-2013, 02:24 PM
VitruvianBmw VitruvianBmw is offline
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Location: Springfield mo
 
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Mein Auto: 740i
Throttle body question

My throttle body isn't closing all the way on my 740i. Is it supposed to?
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  #2  
Old 02-07-2013, 01:08 AM
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PETER NEWMAN PETER NEWMAN is offline
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Location: RAINHAM KENT UK
 
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Posts: 271
Mein Auto: BMW 635 CSi BMW 730i E38
Smile Throttle bodies

I have found many times that a build up of carbon in the throttle body causes failure of the throttle butterfly to close properly and all you need to do is use some carb cleaner or brake cleaner and an old toothbrush to clean off the carbon deposits inside the throttle body housing and it will then close properly, Peter
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  #3  
Old 02-07-2013, 08:17 AM
VitruvianBmw VitruvianBmw is offline
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Location: Springfield mo
 
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Mein Auto: 740i
I did and it helped but the problem is still there. Would it be wise to just replace it? I have access to high powered industrial acids to clean it if need be but I'd rather not break out the full yellow suit lol
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  #4  
Old 02-07-2013, 08:43 AM
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PETER NEWMAN PETER NEWMAN is offline
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Mein Auto: BMW 635 CSi BMW 730i E38
Throttle bodies

I think then that there must excessive wear in the throttle body and it must be replaced, Peter
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  #5  
Old 02-09-2013, 04:38 AM
VitruvianBmw VitruvianBmw is offline
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Mein Auto: 740i
Ill try that next and see what happens. i have one more problem though. I don't floor it very often so it this problem could date back months but I noticed it bogs at 3000 rpm when I take off. Car drives fine other than that. But I'm curious is that could be the start of a bigger problem. Could it be fuel filter or something?
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  #6  
Old 02-09-2013, 05:31 AM
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QSilver7 QSilver7 is offline
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Mein Auto: 1997 740iL / 2006 X5 4.4
M60? M62? M62TU? Which engine? What model year? What build date?

Help us help you better...create a signature (which will automatically appear in all your posts) that includes your model/model year/build date (click the USER CP link at top of page)...or include the info every time you make a post The more info we have about the e38 in question, the better answers you can get. The e38 740i had 3 different engines in the USA...plus many other changes through the production from 1995-2001. By providing more details about your e38 740i...it helps us to help you better by being able to tailor our answers based on specifics about your e38 instead of a generic answer that may or may not apply to your e38 due to multiple engines, transmissions, options, etc.
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Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
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  #7  
Old 02-09-2013, 05:48 AM
Espresso Espresso is offline
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Location: Panama City, Panama
 
Join Date: Oct 2005
Posts: 131
Mein Auto: 2001 740i Sport
the butterfly is not suppose to close all the way. I said this in the other thread. There are specs on how much it should be open when no throttle pressure is given(engine off). You need the specs & a set of feeler gauges.
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  #8  
Old 02-09-2013, 06:12 AM
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QSilver7 QSilver7 is offline
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Location: Northeast Indiana
 
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Mein Auto: 1997 740iL / 2006 X5 4.4
Why 2 posts asking the same question? This makes it difficult to keep up with replies that you're getting because you may be getting answers in both threads...but they can get separated depending on which thread was replied to the most.
__________________
Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg

Last edited by QSilver7; 02-09-2013 at 06:14 AM.
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