Okay guys I'm at a loss here so anything helps. 99 24v with Airdog 165, 150 injectors, and Edge Comp Box tune, 66mm turbo. Built Trans and TC. I am getting some really bad surging. It's only when I really lay into it though. If i accelerate normally, or just cruising, it doesn't buck or surge. But when i romp it down, at any speed, it surges, really bad. My fuel pressure is good, the airdog is new. All new filters. New IAT sensor. And new TPS & Vp44 a few thousand miles ago. No lines are pinched or cracked. The only thing I can think is maybe the MAP sensor, or the wire tap on the VP wasnt great. I have a stealth cover to put on. When I unhook the tune it still does it. It doesn't do it as bad, but It still surges. Not sure what the issue is, anything can help Thanks!