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Old 03-01-2011, 10:11 PM   #4
Mike_Mac
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Join Date: Dec 2008
Fan#: 61110
Location: Windsor, Canada
What I Drive: 04 Red/Black ZX5, 00 infared ZTS

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from my understanding it blocks codes and the computer cant control the EGR actuator thingy under the DPFE. and yes non operational untill retune, if you have an older tune that doesnt have the egr delete you could use that, or stock till you get a retune if you need it working ASAP.
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