Testing injectors we had bought a noid light kit at auto zone and none of the noid lights fit the injector ports

There is a tester called a Noide light. This plugs into each injector wiring socket to see if the injector is getting a pulse. You can accomplish this same thing with a Voltmeter. Sometimes the auto parts store have loaners in Noide light kits.

But this will only show you if power is going to the injector. You need to do an Ohmmeter for continuity on each injector. This will give you a fair idea if they are passing fuel.

You will be able to tell if injectors are getting their pulse using the noide light.

What test told you it is not firing?

You may have valve damage &
little compression

CHECK FOR INJECTOR PULSE IF YOU GO TO YOUR LOCAL AUTO ZONE OR ADVANCED AUTO PARTS ASK THEM FOR THE INJECTOR NOID LIGHT KIT GO HOME AND FIGURE OUT WICH NOID LIGHT FITS YOU PLUG IT INTO THE HARNESS SIDE WHEN YOU UNPLUG 1 OF THE FUEL INJECTORS THEN CRANK ENGINE IF LIGHT FLASHES THEN THE INJECTOR SHOULD BE OPENING IF ITS NOT INJECTOR IS BAD IF ITS NOT FLASHING THEN IT COULD BE A FUSE OR CAM OR CRANK SENSOR OR A BAD PCM OR FAULTY WIRING

Should be able to use a noid light to check to see that it is getting the impulse to the injector. Noid lights are available at most auto stores usually in a set and stothescope place it on the injector should be able to listen to a snapping which should speed up with higher rpms!!

Sounds like your injectors aren't opening if it holds that pressure. Get a "noid light" at parts store that fits your injector harness connection (just a few bucks). Just pull connector off injector and plug in noid light. When you crank engine, the light should blink rapidly. Try all of them, or at least one on each bank (side).
If light doesn't blink, then check your injector electrical circuit. Power to them is fed through your ignition switch, and the ecm grounds that particular injector at proper time to make injector work.

FUEL INJECTOR NOT FIRING COULD BE FAULTY FUEL INJECTOR.HOOK A NOID TEST LIGHT TO FUEL INJECTOR ELECTRICAL CONNECTOR. CRANK THE ENGINE WATCH THE NOID TEST LIGHT SHOULD BE BLINKING WHILE ENGINE TURN OVER.IF TEST NOID LIGHT STEADY PCM FAULTY NOT FIRING THE FUEL INJECTOR.IF FUEL INJECTOR DONT BLINK OR LIGHT UP.YOU HAVE OPEN WIRING CIRCUIT TO THE FUEL INJECTOR CONNECTOR.

A number of possible problems unfortunately. The most common problem would be the ignition module.

CHECK FUEL PUMP AND FUEL INJECTOR FUSE.IF FUSE IS GOOD.YOU NEED A NOID LIGHT TO CHECK TO SEE IF INJECTORS FIRING.YOU CAN BUY A NOID LIGHT AT ANY AUTO PARTS PLACES.WHAT YOU DO DISCONNECT FUEL INJECTOR CONNECTOR.HOOK NOID LIGHT TO CONNECTOR.CRANK ENGINE TO SEE IF NOID LIGHT BLINKS.IF YES INJECTORS FIRING.IF YOU GET STEADY LIGHT.PCM NOT WORKING NOT FIRING INJECTORS.IF YOU GET NO POWER OR LIGHT DONT WORK.YOU HAVE A WIRING PROBLEM.YOU NEED A HAYNES REPAIR MANUAL LOOK AT THE ELECTRICAL WIRE DIAGRAM.TO TRACE FAULTY WIRE.

Engine Control Unit(ECU) instructs the injector when to fire the fuel. Or wiring to the injector from the ECU.

OK IS THERE IS ACTUALLY A mis-FIRE THIS VEHICLE SHOULD BE SHAKING DURING IDLE AND ACCELERATION IF IT IS, here is what you do get a noid light this used to check injector pulse. This vehicle will set a misfire code if injector is not functioning efficiently or bad. A noid light is like a test light bulb can be bought at almost any auto store.SART UP VEHICLE AND DISCONNECT THE INJECTOR WIRE TO THE CYLINDER THAT'S mis-FIRING AND CONNECT noid LIKE TO ELECTRICAL PLUG. DO THIS ONE CYLINDER AT A TIME. The nod light should have a steady flickering light/consistent pattern of flickering. If there is Gap/irratic flickering or no flickering BINGO you have found your problem. NO FLICKERING= bad/broken injector wire if not broken BAD COMPUTER/ECU. IF THE FLICKERING IS CONSISTENT /GOOD = BAD INJECTOR..replace injector and solve the misfire problem. However is all the components tested are ALL GOOD. Then the only other SOURCE for a mis-fire is the camshaft sensor that provides reference for injector pulse and the crankshaft sensor provide reference for Spark pulse. JUST ON A LAST NOTE: make sure all oils are getting electrical power to them. Good Luck I know this is alot of info at once. Contact me if you need more help. Thanks fr using FIX YA