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