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

Aww Man---Poor Throttle Response

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Old 08-25-2009, 09:55 PM
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03 S430 4matic
Aww Man---Poor Throttle Response

I dont get it, i get in the car, turn it on, throttle response is good until the operating temperature is reached then i accelerate and the engine seems as though it want to cut off...it idles fine and there is no codes. whats going on?
Old 08-25-2009, 11:10 PM
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BMW F02 (750Li) F10 (550i)
Sounds like your Mass Air Sensor shiit to bed
Old 08-25-2009, 11:35 PM
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03 S430 4matic
thanks, i have an extra, i will swap and check
Old 08-26-2009, 02:39 AM
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03 S430 4matic
i have a friend with some parts and i swapped the O2 sensors, MAF and Purge Valve and still same Problem this is killin me!
Old 08-26-2009, 08:52 PM
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03 S430 4matic
could it be the plugs or wires? i have 47k on the benz.
Old 08-29-2009, 05:38 PM
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03 S430 4matic
thanks all!

problem ended up being the EGR valve. funny, there is no mention of this in any of my service info

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