W111 fuel air ratio Mixture adjustment. - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 03-17-2011, 09:00 PM Thread Starter
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W111 fuel air ratio Mixture adjustment.

Can the fuel air ratio mixture be adjusted on a W111?
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post #2 of 7 (permalink) Old 03-17-2011, 09:38 PM
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idle mixture can be, running is controlled internally

Brian O
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post #3 of 7 (permalink) Old 03-17-2011, 09:55 PM Thread Starter
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Quote:
Originally Posted by bostosh View Post
idle mixture can be, running is controlled internally
So I just put this thing together hoping to get it done for my birthday end of this month. Wot do you think??
Im running it, its idling rough and exhaust smells rather rich.
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post #4 of 7 (permalink) Old 03-18-2011, 10:18 AM
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It seems that most early FI systems whether mechanical or electronic ran rich. I wonder if the engineers designed them to err on the rich side to insure the engine never ran lean since there is no feedback.

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post #5 of 7 (permalink) Old 03-18-2011, 10:50 AM
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Check the rods activating the throttle and MFI pump for correct synchronization. the ball ends can get sloppy and worn, I've packed them with aluminum foil to tighten temporarily.
Check the spark plugs for correct color rich/lean.

You should get a crisp throttle response.

cold start valve can dribble onto the a/f mix.

I think the w113 website has the instructions to set-up the MFI correctly.

Brian O

Last edited by bostosh; 03-18-2011 at 10:52 AM.
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post #6 of 7 (permalink) Old 03-31-2011, 08:45 PM Thread Starter
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Thanks Guys your input was very very helpful.
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post #7 of 7 (permalink) Old 04-06-2011, 10:07 AM
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Linkage Tour Link :)

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