Fuel line disconnect not reconnecting?

Well, this has been an odd one from start to now. We had the engine apart a second time, two years and 20k miles after doing the head gasket job, because it was doing that shudder on cold starts again. The head gasket doesn't appear to have been defective this time, but we did change from Toyota to Fel-pro while we had it apart. I had not realized how thorough I needed to be in cleaning all those little EGR passages in the intake, and I did get a bunch of junk out of there this time, so ... time will tell whether that was the culprit.

Anyway, I have the car most of the way back together, but I'm having an odd problem. When I went to take apart the fuel line quick connect (inside that part that snaps together), I am pretty sure I had to squeeze the two yellow tabs together to release it. Now it snaps back together, but I can easily pull it back apart unless I put the extra part that snaps together, together around it. (With that part mounted, it stays together even if I pull on the rubber fuel line -- but is that part meant to be the only thing preventing it from coming apart?)

This isn't supposed to be this way -- right? Shouldn't I have to squeeze the tabs together? They don't come up flush with the black part when I attach it, and I seem to remember them doing that in the past. There was nothing visibly wrong inside the quick connector, and I tried to loosen it up by jiggling the yellow part with a tool, but no change.

The line with that connector is around $80 at my local Toyota shop, so it's not horribly expensive, but I'm sure it has to be shipped in and I'd like to make sure I'm not missing something dumb before I order it. Has anyone here dealt with this situation before?

This picture shows what I'm trying to attach (the hose goes over the metal fuel line)

 

ASRDogman, you were on the right track about being able to reshape the yellow piece somewhat. I found a local junkyard with a few Gen3's, but since they're 45 minutes each way from the farm I decided I'd be more aggressive about trying to reshape it than I'd been previously. Basically I tried to squeeze it so that the part that holds the metal fuel line would be narrower (and able to snap into place) and the part that you squeeze to release it would be farther out (and fill up the black housing like it had done before).

And -- it worked! The junkyard wanted 7 bucks for the part, but saving 2 hours of my day on one of the last warm days this year was a real help. It's almost fully reassembled now.

If that hadn't worked and I couldn't have gotten a good one at the junkyard, I'd have paid the 80 bucks at Toyota.

Thanks everyone!