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Home >> Jeep >> 1991 >> Cherokee Laredo, 2D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Symptoms >> Timing Not Affected By Vacuum

Timing Not Affected By Vacuum

Check vacuum advance mechanism and adjusting screws (5.9L engine). See appropriate SYSTEM/COMPONENT TESTS article in this section. See list below.

Check pickup coil pivot for corrosion (5.9L engine only). See BASIC TESTING article.

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