Am trying to post a video of the car at idle so You guys can see. Today I tested the EGR control solenoid and it seems to function the way it should, at idle there is no vac being sent to the EGR valve but when raise the speed I can feel vacuum on the tube that goes to the EGR valve but as soon as engine speed returns to idle the vacuum cant be felt. One thing is weird though, I tried sucking on the line that goes to the EGR at idle speed to see if I noticed a change in engine behavior since this should have opened the EGR mixing port and allowed exhaust to enter the intake manifold but to my surprise it stayed the same. Could this mean the EGR is stuck open?

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87 300d Turbo 241K with original #14 head (blue)
87 300d Turbo 198K will run great again someday (silver)
84 300sd sold ( buyer drove it to Paraguay )