Thread: Emissions. W124 E320 failing NOx
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  #10  
Old 05-01-2010, 05:04 AM
kiwi_bloke_nz kiwi_bloke_nz is offline
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Join Date: Apr 2010
Location: New Plymouth, New Zealand
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All you do to apply vaccuum to the EGR valve is disconnect the vaccuum hose, and suck.

You should be able to hear it snap shut when you remove vaccuum
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