?? Temp sensor - Saab 900 Bulletin Board - Saabnet.com
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?? Temp sensor
Posted by BobD (more from BobD) on Sun, 20 Dec 2015 10:29:39
In Reply to: '86 900S: high HC at idle, JerseySaab [Profile/Gallery]
, Thu, 17 Dec 2015 13:05:57
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This may have shown in other posts I've missed.
Have you tested the temp sensor in the intake manifold that
provides a changing resistance to provide enrichment when cold ?
In my experience they seldom malfunction, but if it's not quite
getting to the lower resistance that provides leaner running
when fully warm that could jam up all other mixture function.
I've managed some change in emission test results by adding an
additional resistor in this circuit to give slightly richer mixture
at full warm running. Even though the oxy sensor and ECU should
even this out it worked to bring down NOX in testing.
posted by 98.125.68...
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