Hey guys I just purchase a 91 tsi. It only has an after market air filter and a muffler. With the rest of the car stock I am boost creeping 20+. Hitting fuel cut. I wanted to change all the fluids and perfom major maintenance but I want to fix the creeping problem. I don't want to hurt the...

Hello all you dsm enthusiast! Just introducing myself.Just purchase a 91 tsi and car is almost completly stock (just have an aftermarket muffler and an intake. Having overboosting problems. Need help