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Home >> International >> 1978 >> Scout II 2D Utility, 5.7L Eng, RWD, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> EGR System >> Testing >> Functional Tests >> Vacuum Amplifier

Vacuum Amplifier

  1. Disconnect vacuum amplifier-to-TVS hose and install vacuum gauge in hose. Start engine. No vacuum should be present at idle. If vacuum gauge indicated vacuum, check improperly routed vacuum hoses and correct (if necessary).
  2. If vacuum is still present, disconnect carburetor venturi vacuum hose at vacuum amplifier. If venturi vacuum is present at idle, repair carburetor. If no venturi vacuum is present, replace vacuum amplifier.
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