89 5.0 LB9 TPI motor. on the EGR solenoid that sits under the coil bracket, what plugs into the back of the solenoid next to the electronic plug. It looks like maybe a vacuum plug. I know that the EGR valve and throttle body plug into the front of the solenoid, but can't find a loose hose or wire. HELP!!! Please!!! going for smog tomarrow. ALSO if anyone knows which plug off the distributor to unplug for basic timing setting( books don't show nothin') THANX to ALL

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