IDLE COMPENSATOR Description The idle compensator is basically a thermostatic valve which functions to introduce the air directly from the air cleaner to the intake manifold to compensate for abnormal enrichment of mixture in high idle temperature. The bimetal attached to the idle compensator detects the temperature of intake air, and opens or closes the valve. Two idle compensators having different temperature characteristics are installed. ldln compemator opening temp-vaults No.1 60 >70C ll40-158Fl No.2 7o-eoc(155~176Fl Eimetal Rubblr valve Orifice EF222 Inspection 1. Check that valve is in closed position wher bimetal temperature is lower than operatin temperature. To check, breathe air into tube 0 suck air. If excessive air leakage is found at the valve replace idle compensator as an assembly. Note that two idle compensator: are mounted [ air cleaner, and that it is necessary to plug the vali. of one of these idle compensators so as to prever air leak while checking the other one. Rubber wlve EF: 2. Warm up engine. 3. Direct warm air to idle compensator. And measure operating temperature of idle cor pensator. SEFC! Place thermometer as close as possible to k compensator sensor. 4. idle compensator is in good order if a "hissin sound is heard when its temperature reacl operating temperature.