Hi guys, I need help. DESPERATELY. I've recently done a ko3S conversion on my AGU, I like to think I've done a fairly good job of it too. The problem is, ever since fitting my FMIC from tuner-stop.com, I have had boost leak problems. These were not apparent before mapping, but were very clear after it was mapped. Around 12-14psi, I get a quiet whine beginning, then around 15psi, this turns into a full on scream sounding like a ghost train! the noise gets more and more high pitched as boost builds, to a max of 18psi spike, and holds around 15psi, with the scream constant. The car was mapped to spike 22psi, and hold 20psi. Which it did, for around 30 minutes after I picked it up from Storm. It also did not make any screaming noise. There was obviously a slight turbo whislte at low throttle, and there still is, but nothing sounds like this bastard! So, to fix the problem, I have done the following: Tighten all T-bar clamps on the 3 ply silicon couplers it came with Still leaks Replace cheap silicon with very thick tight fitting 4 ply from Siliconhoses.com Still leaks Replace T-bar clamps with JCS HI-Torque stainless worm drive clamps Still leaks Add mikalor clamps on every joint, so its now double clamped Still leaks Add an RTV silicon sealant to every joint Still leaks Rebuild forge 007P, run it both ways, no difference Still leaks Run new N75 hose, with sealant at both ends Still leaks I give up. I am running a brand new forge cold side kit, with the DV right near the throttle body the ko3S has done around 60k miles, and seems to be in great condition with no play in the shaft. the wastegate hasn't been adjusted since comming off a TT. I have had the core pressure tested this evening, and it showed no leaks at 1bar at all. I have asked them to test it at 2bar, which they will do in the morning, although they do not think it will leak at all. really guys, help me! I have NO idea what can be the cause of the leak now, I have done everything I can possibly think of, short of selling the car and buying something jap and chavvy that will at least work. Any suggestions what the problem could be? To me, a noise that was not previously there, and a drop in boost, coupled with it using LOTS of fuel, and back firing very loudly on down shifts, can only suggest a boost leak. but where from????