S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

air/fuel mixture screw loc?

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Old 11-05-2010, 06:23 PM
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air/fuel mixture screw loc?

Anyone know where the air/fuel mixture adjustment screw is loc? Car is running really rich and its spitting fuel out the exhaust like crazy. any help will be great. Thanks.
Old 11-05-2010, 06:42 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
The Mass air

sensor adjusts A/F ratio with info from the o2 sensors.
On your M113 engine.
Any check engine light on?
You could have a faulty injector or other issues.
Unburned fuel could also mean it is not running rich it could be that the fuel is not getting burned.
Might be time to get it on a scope. Lots of fuel going out the pipes is bound to take out a Cat converter shortly
Old 11-05-2010, 07:15 PM
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There is a check engine light on. Its from a 2000 s500, That means I shouldn't be starting the car than. There is white smoke coming out from the back and it smells like fuel I'm not losing any coolant at all, and if you step on the gas you can see the exhaust spitting fuel/water out. I got a big stain on my drive way now. I'll check on the injectors, you got to listen for it to click correct with a plug or a long screw driver? well I'm losing fuel really fast, can it be a faulty o2 sensor? The car does shake a lot and it looks like its idling at 750. misfire? Tried renting a code reader but all places are rented out. So I'm stuck waiting until tonight or tomorrow to see.
Old 11-08-2010, 10:53 AM
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2000 Mercedes Benz S500 Designo
Are you sure 750? Seems high unless its cold. Mine idles right around 575-600. Excess fuel could explain high idle.

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