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Home >> Toyota >> 1996 >> 4Runner Limited, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 3.4L >> Emission Systems & Sub-Systems >> EGR Vacuum Modulator

EGR Vacuum Modulator

NOTE: When testing EGR vacuum modulator, it may be necessary to monitor engine RPM by using scan tester. For scan tester connections, see IDLE SPEED & MIXTURE in the ADJUSTMENTS - 3.4L article.
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