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Idle Compensator
- Disconnect vacuum hose at idle compensator and connect vacuum pump to hose. Apply vacuum to hose; if leakage is excessive, replace idle compensator as an assembly.
NOTE:
One of the 2 compensator ports must be plugged while checking the other to prevent leakage.
- Remove idle compensator. Place idle compensator and thermometer in water; heat water while watching temperature. At 140°-158°F (60-70°C) one valve should start opening and be fully open at 158°F (70°C). The other valve should start opening at 158-176°F (70-80°C) on 210 and 310 models. On 510 and Pickup models, valve should fully open at 127°F (53°C). If valve does not operate within specifications, replace idle compensator as an assembly.