Hello everyone. I bought my Voyager back in 2010 and soon after put on Cobra Tri oval aftermarket exhaust. To keep it from popping or back firing I installed a plug in the hole on the right side top left corner that is under the right hand engine cover. I have now just got back my ECU from Ivan and was wondering if I keep the plug in or take it out or does it matter either way. Thanks in advance for your answers.