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Two Things... 200 1990

uid 18083's pic
posted by  lucid on  Sun Jan 27 06:53 CST 2013
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last visit: Fri Oct 24 12:31 CST 2014
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1) The ECU controls the idle speed. The "idle screw" is for adjusting throttle plate position, not idle speed. It's now called the "throttle stop screw". See Bentley section 250 and the related parts of 241 and 242.

2) To control idle speed, the ECU needs to know the engine temp. That means no teflon tape on the Temp Sensor threads. They make the ground path for the two sensor elements (FI and Ignition). The sensor should seal with a copper crush washer.


--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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