Fuel Injector problem

I did disconnect the battery when I changed the fuel injector so I could charge it on the bench. Then re installed it. Thats when it started up with out the check engine light. Will the computer reset it self when you disconnect it like that? Does it sound like my fuel injector is good, along with the fuel pressure regulator? Is there any way to test that on the TBI?
If the fuel regulator went bad could it blow the injector and force the fuel out through it? Any way to test the ECM? I dont have any friends with a 454 suburban or truck from the early 90's to trade with.

So I could test this by disconnecting that injector and turning the key to on, Then there should be no flow through it because the signal from the assumed to be bad ecm couldnt tell it to open?

Is there any way to have the computer checked out before I spend $$ on a new one?

Thank you for the help too !

Engine Performance problem V8 Four Wheel Drive Automatic 193k miles

The motor and training are sound and we've never had any problems before now. The day it decided to act up we had put $20 in gas in it, drove 40 miles with no problems at all. Came home parked it for about 45 minutes, left again, drove about 3 miles and it stalled. Managed to get it running again and putted all the way back home. We changed the spark plugs, the diagnostic code indicated an 02 sensor, so we have replaced that as well. We've added heet to the fuel, and still have not been able to keep it running. One injector has fuel the other does not. I was told that, that was the problem. I have bought a new injector but if it just needs to be cleaned I'd rather do that. How can I clean the injector, do I need to take it apart to do this, if so, how? And this leads me to my 2nd question, to replace the injector how do I take it apart?
Thanks,
Laura

Ok, this is what I've done; replaced spark plugs, O2 sensor, changed one injector the other is fine. Searched all over for a vacuum line that might be off. Nothing. It continues to make a whistling noise or a "sssssshhhhhhhh" noise. After sitting for 2 days without starting it up she idled on her own for a good 7 minutes and with no noise, then started sputtering like she wasn't getting enough fuel at that very second the noise started again. It sounds like air. What could this be? Would bad gas cause this sound?
Again, thanks for all your help.

1994 Chevy Suburban, getting no fuel to injectors. We cleaned the the throttle body, had some sludge build up on the back, were the fuel pressure regulator is, cleaned it keeping debris from fallin in throttle. After wards I lost fuel flow to injectors. Replaced the pressure reglator, no rebuild, had fuel coming from the rail, hand coming up the TB, put it back together and still no flow through the injectors, worked fine proir to the cleaning (which the motor was running) it has had the EGR valve and solenoid and MAP sensor Canister purge sensor and all vacum lines replaced. Fuel pump relay and filter are new, I can hear the fuel pump running when you turn the key, and here the relay open and close circuts with key turn. Distributor and ignition coil and module are new, cap and rotor, and plugs and wires, and a new ECM and prom. Also IAC valve, and throttle position sensor. I am not sure where I should go from here I got fuel all the way just not to the injectors. Please help

Vehicle is
94 Chevy Suburban
K1500 4x4 5.7 V8 350
TBI 2 injector system

Well, I've been slow at getting back. The whistling noise was there before I changed out any parts. Up to date these are the things I've replaced in the order they were done.
1. New Spark plugs
2. Added Heet to the fuel
3. New O2 sensor (had error code 44)
4. New fuel injector on the TBI as well as a new gasket on the injector assembly / TB (I completely removed the injector assembly.)
5. Added fuel injector cleaner to the fuel.
6. New fuel filter
7. Siphoned out all of the gas (about 5 gallons)
8. Added new fuel. (About 3 gallons)

The whistling noise is gone.
The test drive. Spits and sputters, will not make it up a hill, stalls, gas petal floored (nearly) truck not moving, the jumps forward.(Spit and sputtering)

Since most of all of the parts are original on her, I'm assuming the fuel pump could be the cause and the next item to change out. Or the Fuel pressure Regulator sensor on the TBI? Maybe?

Like I said in my previous post I have never had anything wrong with her before other than minor issues like the belt, battery, brakes, water pump, spark plugs, power steering pressure hose, and a clogged muffler? (She had dogged down before, but after we changed the muffler out she was fine).

Thanks for all the advice given and to come!
Laura

Got a steady light. No pulse.

That's a problem. I don't have access to a fuel pressure gauge, and there is no way she is drivable enough to make it to a shop. I believe the cat is welded on. I can't remember off the top of my head right now. I'll check it out tomorrow. Just a quick note. I ran diagnostics on it again, and again the code 44 appeared. Also I just thought of this, I did notice a different smell to the exhaust, hence the reason, (and previous post suggestion) I thought it might have been bad gas. Just wondering (I've never tried it) would sea foam work to clear this up? I'm not a big fan of adding "extras" to my fluids.

Thanks again
Laura

Yeah power to one side only. I have had to replace the distributor and ignition module on it a few times cause it was damaged when I got them. Is the pulse triggered by the ignition module in the distributor