Re: '87 900 SPG only getting basic boost when warm - Saab 900 Bulletin Board - Saabnet.com
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Re: '87 900 SPG only getting basic boost when warm
Posted by JohnK (more from JohnK) on Tue, 3 Feb 2004 09:11:25
In Reply to: '87 900 SPG only getting basic boost when warm, Ben Greenwald, Tue, 3 Feb 2004 08:14:51
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APC system is pretty simple. First I would pull the APC solenoid plug after the car is warm and take a test drive to verify that what you are seeing on the guage is really base boost. True base will be when APC solenoid plug is out.
I would then check for turbo plumbing problems. Maybe a hose split opens up when it gets warm and soft. Make sure that the vac/boost hose that goes through the firewall to the boost guage and pressure transducer holds vacuum when you suck on it.
Next I would check and clean all electrical connections. APC box on fender well, knock sensor under intake runners, and APC solenoid. If you haven't cleaned out the APC solenoid in awhile, due so with carb spray.
I'll bet you find your problem. If not, give us an update.
posted by 208.208.152...
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