Re: Help with APC Pressure Transducer (longish) - Saab 900 Bulletin Board - Saabnet.com
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Re: Help with APC Pressure Transducer (longish)
Posted by MS (more from MS) on Thu, 13 Dec 2001 03:23:27
In Reply to: Help with APC Pressure Transducer (longish), Bob 88 900T, Wed, 12 Dec 2001 17:49:30
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APC pressure transducer is not the same as the fuel cut-off pressure switch. The transducer monitors intake manifold psi (bar) pressure and sends a corresponding signal to the APC box. The transducer is nothing more than a rheostat device which outputs a range of resistance figures as determined by fluxuating amounts of pressure within the intake manifold. Failure is certain when there is no resistance signal at all between the two leads. I suppose it is possible for an aging unit to become less accurate. Or the unit might be stuck on a fixed setting. It's easy to test, and yes, you'll have to remove it from beneath the dash. Love it!
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