Engine Flooding after New Injectors/Spark Plugs

I've had my 2000 XJ for five years now. I've recently invested a lot into it to try and make sure it keeps running great for another five plus years. I hadn't changed the spark plugs since I got it, so I knew I was overdue for that. I was also pretty sure the injectors were stock, and I suspected one or more of them might have a crack in them.

I'm no gearhead, not by a long shot, but spark plugs are easy enough, and looking up the procedure for replacing fuel injectors showed it was pretty easy as well.

I first replaced all the spark plugs, ensuring the gaps of each were .035 inches. They're OEM Champions. One of the plugs had the tip bent in shipping so it was touching the ground electrode, but I bent it back to a .035 gap. All the others' gaps were perfect from the factory.

I took the XJ on a ~10 minute trip around the neighborhood after this just to ensure everything was going well. Everything went smooth. I should have taken it on the highway to be sure, though-- you'll see why in a moment.

Next I replaced the stock injectors (single hole) with remanufactured ones (four hole). I've read people warning against eBay sellers and some saying not to worry if reviews are good. I took the not to worry route, found a seller with excellent reviews and a fair price (~$70, I stayed away from the ~$30 stuff).

By the way, it does turn out one of the old injectors had a crack in it, so now's a great time for replacing them.

At this point I reset the PCM, or at least I thought I did. I realized later that I did the process wrong-- so I didn't actually reset the PCM at this point.

Started the Jeep up-- she started up without a problem, which surprised me as I was expecting it to take a few turns before gas filled up the fuel rail so she could actually have some fuel to start with. Took her around the neighborhood again for ~10 minutes without any problems. Afterward took her out to the highway just outside the neighborhood, accelerating up to 65 miles per hour. In about a mile the check engine light came on and was flashing. Turned around, went back home. Noticed the CEL remained steady when going below ~30 mph but would flash again when up to 50 - 60 mph. I noticed that idle was rough and the exhaust smelled like gas.

Checked the codes and found a misfire in cylinders 4 and 6 and a random misfire code. Tried turning the ignition to start back up again, but she wouldn't start. I took the hose off of the air intake and immediately could see gas fumes rising from the intake hole on the manifold-- looked like a mirage on a hot day. Pulling one of the throttle cables and looking inside, I could see it was completely wet, and I could hear it sizzling in there. It reeked of gas.

After probably an hour or so I tried turning the ignition again to no avail, and the exhaust when doing so still smelled like gas. Eventually I took out all six spark plugs-- the sixth one, which was the first one I removed, was wet with gas, but all the others were dry. I've decided to leave the plugs out with the hood open and battery disconnected all night-- I'm hoping that will at least give the engine a chance for the gas to completely vaporize so I can start over tomorrow.

Here are some of my suspicions, but I don't really know and am hoping for someone smarter than me to lend me some pointers:

* Perhaps because I didn't reset the PCM properly it was still programmed for the old injectors and was pumping too much gas into the cylinders, which didn't really cause any noticeable issue until I was accelerating a lot more on the highway to get up to 65. I'm not sure if that's a thing, though-- could a PCM adjusted for the old injectors result in this serious of an issue? And isn't the PCM supposed to adjust over time even without being reset-- resetting just forces it to relearn instantly? Like I said, I'm no gearhead, so please do correct any misconceptions. Anyway, if this one is true, I should be able to confirm by tomorrow since I've reset the PCM and am leaving the battery disconnected overnight while the flooded engine dries out, effectively resetting it again, but I have a bad feeling this isn't it.

* I think this one is unfounded, but I'll mention it anyway: I forgot to snap the intake throttle cables back into place over the engine-- you know, the little snaps on top of the engine block that keep the cables from wobbling around all over the place. Perhaps if the cables aren't snapped firmly back in place, they'll wobble as they're pulled and not allow the air intake to open as wide, causing the air/fuel mixture to be off kilter in favor of fuel. But I don't think that is true now that I've thought about it more-- seems like the cables should pull the throttle properly regardless of whether they're loose off the engine or not.

* Then I thought maybe that sixth spark plug was the one I had to bend back into a .035 gap-- maybe it was bad and wasn't burning fuel appropriately, allowing for accumulation of fuel in the cylinder over time when accelerating? But wouldn't only cylinder 6 misfire if that were the case? Not 6 and 4, unless spark plug 4 was also bad?

* Lastly but perhaps most likely is maybe I've just got crappy injectors and some of them are dumping fuel out like crazy. Like I said, the company had really good reviews, but it IS eBay after all. I'm hoping to exhaust (no pun intended) other possibilities before resorting to redoing the injectors again, though, and I'd like to be a bit more certain that it's really the injectors before I go shake my fist at the seller.

Oh, one more related thing-- now that the spark plugs have been burning a fuel-heavy mixture for ~20 minutes of drive time and at least one got visibly flooded, do you think they must be cleaned, or do you think they'll be fine since it's been just a short time? I've never bothered cleaning plugs before, but I don't want that to affect my future attempts at resolving this problem.

Thanks much in advance.