exhaust leak??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

89s132b · 01-12-2004, 11:10 AM

I have an SR20det with stock t25 and stock manifold. When I turn off my car, I hear a hissing noise, like air escaping for about 5 seconds. I cannot pinpint it, but it definately sounds like it is comming from somewhere around the turbo. I cannot hear the hissing while the car is running.
The car runs and boost great except it slowly falls off from 1 bar to 0.6-0.7 bar at 5k-7k rpms.
Does this sound like an exhaust leak?
If it is, could it be responsible for the boost fall off?

01-12-2004, 11:10 AM	#1
89s132b Zilvia Member Join Date: Apr 2003 Location: Oklahoma Posts: 220 Trader Rating: (0) Feedback Score: 0 reviews	exhaust leak??? I have an SR20det with stock t25 and stock manifold. When I turn off my car, I hear a hissing noise, like air escaping for about 5 seconds. I cannot pinpint it, but it definately sounds like it is comming from somewhere around the turbo. I cannot hear the hissing while the car is running. The car runs and boost great except it slowly falls off from 1 bar to 0.6-0.7 bar at 5k-7k rpms. Does this sound like an exhaust leak? If it is, could it be responsible for the boost fall off?