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Home >> Isuzu >> 1985 >> I-Mark 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Component Testing >> Check & Relief Valve >> Except Impulse
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Except Impulse

  1. Remove check and relief valve and blow air into valve's fuel tank port. Check that air flows out of canister port and not out air filter port. See Fig 1 .
  2. Blow air into canister port and check that air flow is blocked.
  3. Blow air into air filter port and check that air flows out of fuel tank port and not out of canister port. Replace valve if it does not operate as outlined.
Fig 1: Testing Check & Relief Valve Test applies to all models except Impulse.
G38537
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