Re: Erratic Low High Boost - Saab Performance Bulletin Board - Saabnet.com
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Re: Erratic Low High Boost
Posted by Steven Pfaff (more from Steven Pfaff) on Tue, 13 Oct 2009 23:11:44
In Reply to: Re: Erratic Low High Boost, JoshNY, Tue, 13 Oct 2009 13:39:52
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Maybe the BPV is sticking intermittently. Depending on where it sticks you could get base boost or uncontrolled boost. On the other hand, that wouldn't explain why you were only able to achieve 15psi when it went beyond base boost. Just to clear up on your original post; Did you say you have sporadic boost with the wastegate hose disconnected? If so, you must have something wrong with the wastegate actuator. If the hose isn't connected to the wastegate actuator your turbo would overboost any time you put your foot to the floor. If it reverts to base boost in this condition, the spring in the actuator isn't holding the wastegate closed; the exhaust pressure would overcome the wastegate to the point the actuator was fully extended (base boost).
posted by 98.144.60...
Posts in this Thread:
- Erratic Low High Boost, JoshNY, Tue, 13 Oct 2009 07:14:16
- So, what's the verdict? nm, Steven Pfaff, Fri, 16 Oct 2009 09:15:31
- Re: Erratic Low High Boost, Simon S, Tue, 13 Oct 2009 11:00:31
- Re: Erratic Low High Boost, Steven Pfaff, Tue, 13 Oct 2009 10:56:17
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