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i just want to get this straight, did I read on here a while ago that if you have a unti to clear codes, you dont want to clear the code of the EGR being unplugged because it will make it act funny? so should i plug it back in until i get the delete, or was I just imaganing I read that.
deffinatly. when you unplug the egr you are in essence stoping the servo from opening and closing. so when you start the truck the ecm looks for the servo motion and the temp increase. when it does not see this that is where you get your check engine light from. then when your light comes on the truck look's for a fix. it will try to use old files from the computer to correct the problem this often causes Regen.... now if you have a dpf delete there is nothing to catch the 4th injection cycle then it comes out the back of the truck in a big white haze fogging out the whole neighborhood ..now when the truck does a regen it is looking for the catilist temp to raise quickly to burn the soot out of the dpf .. but since there is no dpf the truck does not see the temp it wants so it will slip into limp mode..these are all possibilitys of unplugging your egr. even when you do unplug your egr it does not stop completely the soot for recirculating into the truck. it stops most but not all. now if you clear codes you have much less chance of this happening because the truck will think the dpf is broken so it will not want to do any regen...but still possible.
if i can help you get some code free electronics let me know
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