In this How to, You will learn how to replace an EGR Vacuum Regulator Solenoid on a 4.0 SOHC. Tools required: Small ratchet & 9/32 socket Step 1. Disconnect your negative battery terminal. Step 2. Using your ratchet and 9/32 socket, Remove your throttle cover. Step 3. Locate the EGR Vacuum Regulator Solenoid. The solenoid is directly behind your EGR valve. Disconnect the electrical connector, then disconnect the 2 vacuum hoses on the bottom. Step 4. Once you have disconnected all vacuum hoses and the electrical connector, using your ratchet and 9/32 socket, remove the 2 bolts holding the solenoid to the side of the intake manifold. Remove the solenoid. Step 5. Mount the new Solenoid in reverse order of instructions, and re-attach your battery negative terminal. Congratulations! You have successfully changed out your EGR Vacuum Regulator Solenoid!