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  #1  
Old 09-21-2009, 04:27 AM
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what is the function of the downdraft throttlebody on the 240D

i was wondering if anyone here knew what the function of the downdraft throttlebody on the 240D is?

ty
john

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  #2  
Old 09-21-2009, 08:24 AM
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Originally Posted by 3lpuller View Post
i was wondering if anyone here knew what the function of the downdraft throttlebody on the 240D is?

ty
john
It's my understanding that it provides some additional intake-manifold vacuum for the EGR (Exhaust Gas Recircultion) emissions system fitted to 1982 & later US-market 240Ds.

Happy Motoring, Mark
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Old 09-21-2009, 08:58 AM
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Best answer I've ever heard on that. +1.
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Old 09-21-2009, 09:23 AM
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X3 - I know I have read that elsewhere on this forum, so I would go with that also.
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  #5  
Old 09-21-2009, 10:03 AM
Craig
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I agree, I actually removed mine because the linkage was messed up and my EGR is defeated. It did not seem to affect anything.
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Old 09-22-2009, 03:23 AM
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ty all!

i dont exactly subscribe to the idea of soot injection - extra weight savings!
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  #7  
Old 09-22-2009, 06:28 AM
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Quote:
I agree, I actually removed mine because the linkage was messed up and my EGR is defeated. It did not seem to affect anything.
Me too- I swapped in pre-82 manifolds.

Rick
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  #8  
Old 09-22-2009, 08:12 AM
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Originally Posted by rs899 View Post
Me too- I swapped in pre-82 manifolds.

Rick
I just removed the "flapper" and linkage.
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Old 09-22-2009, 09:12 AM
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Anybody have a pic of exactly what yall are talking about???
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  #10  
Old 09-22-2009, 09:16 AM
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Yes, most our old EGR systems have ceased to function in some manner. I've left the components intact on mine as their presence doesn't seem to affect the performance. Besides, who knows when some additional draconian anti-diesel EPA regulations may appear and demand a functioning EGR.
And, though the extra valve-cover mounted linkage and vacuum plumbing is annoying at valve adjustment time, on my automatic 240D, some of that vacuum setup is needed to control the tranny shifting.

Happy Motoring, Mark
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Old 09-22-2009, 09:37 AM
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And, though the extra valve-cover mounted linkage and vacuum plumbing is annoying at valve adjustment time, on my automatic 240D, some of that vacuum setup is needed to control the tranny shifting.

Happy Motoring, Mark[/QUOTE]


on 220 and 240 automatic cars the transmission needed a vacuum signal to determine throttle position and load. Scrap it on a straight drive car.

Robert
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  #12  
Old 09-22-2009, 04:16 PM
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I always thought that flap was to block off the intake at shutdown and (hopefully) preclude a runaway diesel situation, but maybe I was misinformed.
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  #13  
Old 09-22-2009, 04:50 PM
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Originally Posted by kingdoc1 View Post
I always thought that flap was to block off the intake at shutdown and (hopefully) preclude a runaway diesel situation, but maybe I was misinformed.
The EGR flap has such a wide gap surrounding it that it would be pretty usless in event of a diesel runaway!
Now if you could get the air-cleaner cover off quickly enough to stuff a rag over the flap....

Happy Motoring, Mark
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Old 09-23-2009, 01:41 AM
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there's a guy who'se selling an egr delete kit for the turbo engine

http://www.youtube.com/watch?v=gyCUrJvwVDU

i originally found this vid embedded into his ebay listing, but i forgot his ebay name

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