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I would not suggest doing this as a performance thing.

I had it removed in the past, and then back on, and you do not notice a difference.

I suggest buying mods to help with peformance, and leave the Emmisions stuff alone, as it does nothing for that.
 

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My EGR is blocked. If you search for stumble fix you will see it. I got sick of the stumble and hesitation and finally completely blocked it off. I think my DPFE sensor was going bad because my car was stumbling REALLY bad from 2000 - 2500 and teh topend was horrible. There was also a distinct smell of fuel from the exhaust. That's gone.
 

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Is there anyway to eliminate or at least disable some of the emissions control in a 2002 focus? My friend disabled his EGR valve for his older cutless ciera and it really has helped. We tried it last night, but after a bit, the CEL came on and I had to put it back together properly. I know it won't pass the emissions checks, but I would rather hook the emissions back up whenever I'm trying to get my car inspected than to always have it running in my car.
 
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