An EGR is there for a reason. The biggest is to reduce emissions and improve engine breathing (at under certain conditions). If your engine runs lean the egr lowers the combustion temperatures and prevents pre-ignition (air fuel mixture explodes before the spark does the job). Pre-ignition will damage your engine especially at higher engine speeds.
If you are going to plug off the egr port maybe punch a small hole in the plug about half the size of the port in the intake may help to get by. But replacement is preferred and not illegal. Tampering with any emission components is a federal offense as I'm told in the western united states.
Hope this helps
Tuesday, December 3rd, 2013 AT 7:14 PM