Hi guys, just looking for some advice here. My Leon has a stage 2 map by R-Tech and was pushing about 1550mb of boost (roughly around 22.5psi) however a little while ago it started to plummet and now boosts on average anywhere between 1100-1250mb. I’ve been endlessly reading forums for common issues etc and I’ve replaced the N75 valve for a genuine VAG one, a new Badger 5 oversized TIP as this was leaking at the metal flange that goes onto the turbo inlet when I did a smoke test, and a new forge 008 recirc valve as apparently these can go weak after some time too, it’s also had new spark plugs recently as well. While the boost did pick up slightly in the lower gears, it doesn’t hold the boost in the higher gears. I’ve removed my turbo and checked for play etc and there is none; I’ve also tested the actuator with a mittyvac and the cracking pressure is about 5psi and when the actuator is fully opened, it holds the position so I assume there are no leaks from there and the spring appears to be okay. On my liquid gauge it’s saying the N75 duty is only about 85% but as I mentioned earlier, the n75 is brand new! Has anyone else experienced this or got any ideas of any thing to check that I might not have done? Advice would he greatly appreciated! Thanks!
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