APC solenoid weirdness and boost issues (pretty long) - Saab 9000 Bulletin Board - Saabnet.com
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APC solenoid weirdness and boost issues (pretty long)
Posted by Craig [Email] (more from Craig) on Thu, 2 May 2002 18:05:24
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My '87 9kT hits max boost (11psi) and then tapers down to near base boost (6psi) before 5000rpm. Plugs are new, no missing, no detonation, base boost correclty set, but the boost just quickly tapers down. It didn't use to do this.
I pulled my APC solenoid today and inspected and cleaned it. I can freely blow and suck air into both the W and C ports which I think is normal. However, I can also blow and suck air slowly from the R port, which doesn't seem quite right. Could there be a leak in the solenoid that is reponsible for my excessive boost taper?
The only other things that I can think of are a stiff wastegate actuator or a clogged cat. I am reluctant to pull the W hose to test these theories as my overboost switch is bad and has been bipassed.
Any thoughts appreciated!
Craig
posted by 152.16.24...
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