Throttle body stop setting for 1074 450 SEL - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 12-12-2011, 09:30 AM Thread Starter
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Date registered: Dec 2011
Vehicle: 1974 450 SEL
Location: Raleigh, NC
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Throttle body stop setting for 1074 450 SEL

I have a 1974 450 SEL with electronic fuel injection and need to know the proper adjustment for the throttle body stop. One source said one full turn clockwise once screw begins to open the butterfly valve. The engine vin is:117.893-12-014942.

Thanks, wd450SEL
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post #2 of 3 (permalink) Old 12-12-2011, 03:25 PM
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Date registered: May 2007
Vehicle: 64' 220SEc, 72' 300SEL 6.3, lots of parts
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The throttle plate stop screw should not be used to set idle, there is a separate circuit for idle. So if it has been messed with, take the throttle body off, clean insides, adjust the stop by holding the body to a light and adjusting the stop until light is not seen and the valve does not "stick" The delicate flap is precisely machined to fit on an angle and not bind. and pass idle control to the idle curcuit via the throttle positioning switch on the side of the body.
this is a critical adjustment which can cause much grief (if not perfect)

Brian O
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post #3 of 3 (permalink) Old 12-12-2011, 04:43 PM Thread Starter
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Date registered: Dec 2011
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Throttle body stop setting for 1974 450SEL

Brian, Thanks for your help! I will have to make that adjustment then re-adjust the throttle body switch. Do you have precise instructions for that process?
I continue to be in your debt.

Walter D
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