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Home >> Mercedes Benz >> 1984 >> 190D Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR System - Diesel >> Testing >> Vacuum Control Valve

Vacuum Control Valve

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  1. Connect vacuum tester (116 589 25 21 00) to vacuum control valve and check vacuum at idle (9.6-11 in. Hg). With engine stopped and throttle linkage at full throttle stop, vacuum should be 0 in. Hg. If test is OK, end of test. If test is not OK, go to next step.
  2. Test vacuum lines and check vacuum pump. Adjust vacuum control valve and replace, if necessary.
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