Ok, I just realized I made a mistake. The blue dot hose is where the solenoid gets vacuum from, so if you disconnect it, there won't be any vacuum to pull the seafoam through the solenoid. You need to disconnect it from the other side of the solenoid and run the seafoam through it on that side. Have a look at this vacuum diagram (it's for an OBD2 car, but the EGR part of it should be the same) and see if you can find the line on the other side of the solenoid:
Whether it will have enough vacuum to flow the seafoam with the EGR solenoid closed it another question, but we can force the solenoid to open if needed.
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'94 Laguna Blue LSi ~159k
.......JDM ultra short-geared 3.900 STi Version 7
6-speed w/ Cobb shortshifter,
ECUtune 244,8.1mm/256,9.1mm i/e cams,
group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT
steering wheel, apkarian's
LED tails,
silver STi BBS wheels,
PWR radiator,
redstuff pads f/r,
drilled/slotted rotors,
bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable
lateral links,
KMac c/c plates, Stebro exhaust,
ECUtune 1v5, Optima battery in the trunk where it
belongs.
Turbo project
'97 Ebony LSi ~137k #036
.......Power mode mod, JDM clear corners, BBS wheels.
AUX/pocket mod
Now a mod "over
there"
............Photo album