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Did some reading. I have the no limit fab egr delete. Do i need to leave the butter fly valve plugged in or do i leave it unplugged. It did say spartan tuner needs it. I got the sct livewire.
Check with whomever wrote your tunes and get their input. My throttle valve is unplugged, as was recommended at the time. I can't imagine needing it to stay functional after an EGR delete, but if that is how your tunes were written, it could be that it has to remain plugged in. Many people actually completely remove the throttle valve when doing a delete.