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Struggling with high idle on 1986 240 with LH 2.2 200 1986

posted by  Dave Stevens on  Wed Dec 20 11:09 CST 2023
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last visit: Sun Jan 1 02:36 CST 2012
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For excessive high idle problems that change with temperature like that, I would have two main suspects a) missing signal from the microswitch on the throttle shaft (ECU doesn't even know it's supposed to be maintaining idle) and b) bad signal from the ECT (either bad wiring connection, or failed temp sensor, rearmost of the two under the intake manifold). Inspect wiring carefully, especially as yours is square in the disintegrating wiring insulation years. Then time to break out a multimeter. There are specs you can find for the temp sensor.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now






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New 1 Struggling with high idle on 1986 240 with LH 2.2 [200][1986]
posted by  drj434343 subscriber  on Tue Dec 19 23:44 CST 2023 >


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