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Home >> Mitsubishi >> 1991 >> Eclipse Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Controls - System/Component Tests) >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> System Testing (Federal)
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System Testing (Federal)

WARNING: This page is about a different car, the 1991 Mitsubishi 3000GT and 1991 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect Green-striped hose from throttle body, and connect vacuum pump to hose end. Plug nipple where hose was connected to throttle body. When engine is cold, 122°F (50°C) or less, and at idle, apply vacuum to disconnected hose. If idle does not change and vacuum bleeds down, system is okay.
  2. When engine is hot, 205°F (95°C), and at idle, apply 1.8 in. Hg. If idle does not change and vacuum holds, system is okay. Using a vacuum pump, apply 7.7 in. Hg. If idle becomes unstable or engine stalls (and vacuum holds), system is okay.
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