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1982 K-Jet--idle questions re: CIS ECU and temp sensor 200 1982

posted by  mario on  Sat Feb 18 19:27 CST 2006
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last visit: Fri Sep 26 09:26 CST 2014
[RELATED]

Hello,

Having the same car for about 22 years I can give you some info. The temp sensor is located on the block next to the distributor on about the number one cylinder. It has two wires and acts as a variable resistor that changes with engine temperature. When the block is cold on an 82 you will get about 2000 to 10000 ohms. When it is fully warmed up the reading is about 300 or less ohms. The ECU sees these changes and corrects the idle accordingly using the Idle Control Valve. Use any Ohm meter to check the resistance as the sensor warms up. If you want to you can go across pins 9&11 on the Ecu to read the value changes. If the readings are not right check the harness wires to the sensor for problems. If the unit is bad make sure you get the one for an 82 not an 81 (they have different ohm values).

As far as the idle issue have you done the base idle adjustment?. If the base idle is off (low) the CIS will not have the proper control of the idle. This causes some strange idle changes. Find a Bentley,Haynes, or Volvo Green Manual and set it up to spec then see what happens. I assume you have cleaned the IAC also. Let us know how you make out.

Mario


--
'I've always been crazy, but it's kept me from going insane' Waylon Jennings






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