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Drove truck yesterday and every so often truck would lose power and I would catch the glow plug light poping up. The one that comes on when you first start the truck cold. Did a code read and showed 0487 which is egr related. I did a gogo diesel egr delete a couple months ago. But still have the egr valve plugged in. Also deleted the throttle body with a cfm elbow but left it plugged in also. Any thoughts