I think there are quite a few waiting for a good replacement for this one. There are various threads where people open them up and replace the charcoal. This all assumes the check valves are ok. Some report using canisters from other vehicles though as far as I can tell, none are a good fit. It...
Could be something as simple as ignition wires, cap or rotor. You could try poking the wires gently with a well insulated stick and see if there is a change.
To anyone who followed this. A new replacement hub was required to resolve this problem. This problem became so bad that there was insufficient clearance between rotor and caliper to install the inboard pad. What apparently happened was that the inside bearing race spun and moved the disk...
My recollection is that the hard lines are dipicted on the hood vacuum diagram. It looks to me as though your hose connects to a hard line but the picture is a little unclear. By a process of elimination, you should be able to figure out what isn't connected.
I recently replaced mine in my '92 with a Denso from Amazon. Looked exactly like what was in there. Works like a charm. Fuel economy improved significantly which surprised the hell out of me. Job was far easier than I'd imagined. Be sure to have a new tank rubber seal on hand.
Don't hesitate replacing a u-joint or two. I had a similar situation and replaced the defective part and away I went. Until the spline is shot, this strikes me as the way to go. You can always replace the driveshaft if nothing else works.
If you're bound and determined to try a fix, I'd look for a bulkhead connector the approximate size. I'd try it. You'll need to use a Dremel or the like to put flats on the inside and outside of the neck. No idea of your chances, but maybe??? Or epoxy? What the hell. It's not worth much this...