What damage did I do to my motor?
#1
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My EGR block-off plate (on the intake) came apart during a long trip. Basically the hole on the intake was open for about 250miles. The clown that made the block off plate had made it out of cardboard (I didn't know this since he painted it and covered it in silicone). After I got home I plugged the hole and went and bought an expansion plug. Now that it's plugged, my truck stumbles at idle and nearly dies when I change gears. Does it need time to relearn the idle? While the plug was open, it idled at 1200. Is it possible that I did some damage to the internals by driving it like that? Thanks.
#2
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i'd say its very unlikely that you did any damage, it was probably just running a bit lean since there was un-metered air coming into the motor. I think it'll straighten itself out.