Oh, what is it now?, A problem, with something. Options

[Barretta]

So, I've spent the last few hours pouring over the 'Garages' past posts, but can't seem to put my finger on it. Here are the symptoms--that I thought to be 'vapor lock' on my '74 1.8 L-Jet, rear mounted fuel pump:

I drove it about 30 miles with no problems; great power, accel., response etc. I stop at a gas station to go to the bathroom (about 2 minutes total). Go and start up the car--started up fine--and try to take off, but it had next to no power; it was spitting and sputtering pretty bad, once it kicked out completely. But it smoothed out after 2nd, but still a HUGE loss in power. I assumed it was vapor lock, so I let it set for a few more minutes (10 or so--I know, not long enough, but I had places to be!). The sputtering stopped, but the power was very bad.

I've let it sit for over an hour and started it up, still the same. I've read the forum, like I said earlier, but I'm not sure of the real problem. I hope it isn't anything terrible--after all, it ran great until I shut it off. I did notice it was running a bit rich the past week, but I had it adjusted and it seemed to be ok. Any ideas? Poor little beast doesn't want to get passed going 30 miles an hour on the highway (IMG:style_emoticons/default/sad.gif).