Jeep Wrangler/YJ 1987-1995 Repair Guide

EGR/Canister Purge Solenoid

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The vacuum for both the Exhaust Gas Recirculation (EGR) valve and the vapor canister purge function is controlled by the EGR/Canister Purge Solenoid. When energized by the ECU, it cuts off vacuum to the EGR valve and canister. The solenoid is energized during engine warm-up, closed throttle (idle), Wide Open Throttle (WOT) and rapid acceleration/deceleration. If the solenoid wire connector is disconnected, the EGR valve and canister purge function will be operational at all times.

 
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