Attention: TDR Forum Junkies 
Since I installed my stage 4 injector nozzles, I have experienced surging while applying power. I noticed this once before when I had only the comp box. The solution then was to back my adjustable waste gate elbow off a tad. Now that I have both the nozzles and the box, adjusting the wastegate doesn't seem to help. If I turn my box off the surging goes away. Any thoughts? 
