Ok, so I've been doing some research on here, and I'm wondering what this sounds like. I've got a working theory but I'm not sure what the next step would be to test it.
In the last couple weeks I've been having trouble with my car shaking and stumbling BADLY and occasionally stalling when started hot. While this is happening, if you give it light or even mid throttle, it has no power, won't rev much and tries to stall. open it hard once though and it evens out and runs just fine(at least, as good as usual) until the next time it's shut off for a few minutes.
My theory is that when I had my injectors put in at a shop(which screwed me repeatedly, as I've been finding out), they messed up the o-rings on them. I'm thinking this because it sounds almost like a flooding issue to me, seeing as it goes away after you rev/clear the engine. Also, right after I had the injectors put in, I tested the FP, and it sat right where it should, but dropped, slowly. I thought that was normal or I had a bad tester because both the feed and return line were clamped off and it was still slowly falling. Now I'm thinking that it was the new injectors all along.
Does this all sound about right? If so, how difficult is it to replace those o-rings? I took it to a shop because I wasn't convinced I could do it right, but apparently neither could they x_x. And if there's other possibilities for this, I would love to hear them.

 

O-rings won't cause that. The upper ones will leak gasoline to the outside world if they're bad, the lower ones will leak vacuum. THen you'll have a pile of that stuff all over your manifold, which is dangerous; the state of California has proven conclusively that laboratory rats can't survive for even a few seconds in an atmosphere of pure vacuum, so it's a controlled substance out there. You have to buy a special appliance to clean it up called a "vacuum cleaner".

Not sure about this "shop" you speak of. What's that? Isn't that where they sell dresses and shoes and stuff? I hear my wife and daughter talking about them all the time? Didn't know they'd let you take a car into those? How does that work?

Take your fuel rails and injectors off. Put the injectors into the rails, with the little clippy things, so they don't pop out. Leave the electric connectors off. Cycle the key on and off a few times to prime them. Dry them off with a towel or something and stand and watch and see if any are dripping.

If you need injectors, buy some used Frod light-blue-top Bosch ones off ebay, soak em in lacquer thinner for a couple of days, get new O-rings, and put em in. Might have to grind just a scosche off of the bosses where the rails go, as those are just a smidge shorter than the Rochesters.

 

Well waddaya know? California got something right. for once.
right on, thanks. I'll give it a shot as soon as I can. I'm having a pretty hard time believing the injectors themselves are bad though. Like I said, they've only got 4-6 months on em, so I'm hoping that's not the case. But it's worth looking into for sure. any other possibilities that could be causing this?

 

There are several things, IMO, that could cause similar symptoms.

Mine had a bad, really bad, coil wire that caused shaking and rough idle, surging, and occasional stalling. Finally it died altogether due to a dead ICM. Replacing the coil wire and ICM made it all a-OK again.

 

I was thinking along those lines too, and I've actually already replaced the ICM, coil, coil wire, cap & rotor in the last 6 months as well. Anyone think the dizzy could be at fault here? I've got an odd strobe on the timing light, not a steady strobe, more like a flash flash flashflashflash flash flash. I hope that makes sense lol. but I've had no luck getting that fixed either.

 

FWIW, some while (as in a few years) prior to that coil wire and ICM I did replace all injectors with Ford/Bosch injectors because of poor running similar conditions and way out of spec (low) resistance.

If you don't have one I'd suggest trying to get hold of a GM/OEM service manual. Really helps walk though things in a step-by-step, ordered process.