APC troubleshooting - Saab 900 Bulletin Board - Saabnet.com
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APC troubleshooting
Posted by Ethan (more from Ethan) on Sat, 1 Dec 2001 11:09:37
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Hi,
Just bought my first Saab, and 84 900 turbo with 125k miles.
Problem:
I only get base boost, so I've begun to troubleshoot the APC system.
What does it mean if the APC solenoid chatters when the power is applied to it (with engine not running & engine running)?
With the solenoid powered by a separate 12v supply it clicks once as it should...
I also read that the solenoid is supposed to chatter when the pressure transducer is pressurized to .5 bar, so if if chatters when the engine is not running, assuming everything else is ok, then should the prob be the p transducer?
Also, if I blow thru the center port while unpowered, the air goes correctly only from c to w. But when powered, air blown thru c goes to both r & w - is this ok or is the valve faulty?
Thanks in advance for any help!
Ethan
posted by 66.108.17...
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