Just wanted to follow up (cuz I hate when people dont!)
I finally got around to running a speedo cable through the egr tube. It is hard to know when you reach the intake side so I looked down the held-open throttle actuator with a flashlight until I could see the tip of the cable poke through.
In addition I changed the coil connectors and put in new bosh super plugs.
Don't know which it was but regardless it is fixed and no more check engine light for code 4.
Thanks all, as always,