Randomly Low boost - 88 9kt 5spd - Saab 9000 Bulletin Board - Saabnet.com
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Randomly Low boost - 88 9kt 5spd
Posted by Karthik (more from Karthik) on Thu, 18 Mar 2004 00:02:58
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Boost for me is very irregular. Sometimes it goes all the way to 15-16 psi (I have a calibrated turbo gauge) in 5th when the engine isnt accelerating too fast (like in 2nd). Normally, when and if it hits 15, it immediately drops to 12 which I guess is the APC cutting in. The difference can be felt immediately.
However, today I have a new problem.
1. Sometimes boost was limited to 5 psi! Out of nowhere!
2. Sometimes it hits 12-13 psi and then rapidly (but not immediately) starts to drop to 5 psi.
3. Sometimes it maintains 12-13 psi consistently.
The difference in power is obvious. There are no vaccuum leaks and the Bypass Valve is fine. I know the previous owner put a modded APC in the car that allowed higher boost.
Any ideas?
--
Karthik
posted by 24.19.184...
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