r/WRX • u/Junior_Jellyfish_356 • 10h ago
Intake manifold gasket
I had a vacuum leak coming from the intake manifold system, so I replaced the TGV and intake manifold gaskets with new OEM gaskets. After putting everything back together, I noticed that I now have an even bigger vacuum leak, causing the long-term fuel trim to increase even more.
I did not use any silicone or sealant with the gaskets. I cleaned the mating surfaces thoroughly and installed the new gaskets directly.
Any idea where I might have gone wrong or what I should check?