Loss of power, stalling at stops and slows, codes P0300, P0107, P0105 and P0105. Will stall but when put into nuetral will start right up.

This could be a lot of things. one of the tests that you need to run is shift it into nuetral when you are stopping and see if it still drops RPM and wants to stall. This will eliminate or conclude that it is a transmission issue. If it is still doing this then it could be a vacuum leak or fuel delivery issue.

**** = jeeeerk.....?
no year, stated. wow ! 1993 to present.!
only Jeep GC.
no engine stated. nor transmission option type,?
stalls, all stalls end with the CEL glowing this is NORMAL the CEL
the CEL glows at key on, for self test. and at all stalls.
if you had looked closer at the cluster ,lots of lamps glow , at self test.

the jeerking (spelled wrong to fool the stupid bad words engine)
Jeerking is usually engine gross misfire, or loss of DC 12v electical power to the EFI systems. called DC power loss or battery power lost.
if all lamps in the car work , radio, heater blower, dash lamps all work
then the DC power is ok, Head lights work at STALL.?
it's not the transmission

so its just an engine stall. (RPM was 0, is the big clue there)
engine RPM = 0 is a stall.
cause by gross misfire, The PCM does many things to stop all stalls.
but cant correct gross misfire, it cant.
top reasons on jeeps is....

or the JEEP ASD relay dropped you out)
btw: ever get a tune up this decade or every 60k miles?
if not , why not?

There are all these ways for the ASD relay to drop.
here are all ASD causes.

http://www.fixkick.com/Jeeps/ASD.html

there are tests for each drop logic path..
many are simple, did the SKIM lamp glow?
what I do after a real tune up is.

connect a scan tool and drive.
and bam, communications failure, you lost 12vdc power to the PCM.
bad 12v power. (loose fuses to PCM?) battery cable lugs GREEN?

or you get DTC errors. live or pending or freeze frame seen.
got DTCs?, BINGO.

The PCM even tells you ASD pin errors.
bad ignition coil (s)?
etc.

2506 PCM/ECM Power input signal range/performance
110 IAT Intake Air Temp sensor 1 circuit
104 MAP/ Baro sensor low input
You probably did do some damage by not isolating the engine and controls out before the repairs/mods were started.

Sounds like the Mass Air-Flow Sensor may be toast. I think you are on the right track. My scanner does not see MAF either. good luck.

PO300 code means miss fire on the cylinders, That is usually caused buy bad spark plugs end wires,PO401 code means a problem with the EGR ,Valve Sticking.

when your car stalls by turning left or right, usually a loose or a glazed belt is suspected. reason being is that the pump is being put under a load by the power steering piston. making belt slip because it needs more torque to spin pulley. also draws more current, so check idle speed and spark plugs.

code p 0106/7 refers to manifold absolute pressure (MAP) and BARO pressure sensor --range /performance and low input problems ===causes wiring ---MAP sensor---Baro sensor --wiring short to ground ---ECM
no 1 not firing would be a problem injector

Are there codes in the transmission computer? Likely the torque converter clutch is not disengaging or a holding member with the transmission could not be releasing. this could be caused by a faulty shift solenoid or a mechanical failure with the transmission. Check to ensure the transmission shift properly under all conditions. Also, stall test the torque converter, put it in gear hold the brakes firm and throttle the engine. Generally the torque converter will stall out around or above 2,000 rpm. If it stalls out much lower, check the torque converter clutch solenoid for proper operation.

Again, check the transmission computer for codes. You will need an advanced OBD1 scan tool which can communicate like a hikock scan tool ( ford factory for that era)

Try replacing PCV valve on the valve cover-had same problem one time on a 3100 I had.

This sounds like the loss of electrical power because of the lights.Any chance of a broken engine/transmission mount allowing to much movement and breaking a connection? Along this same line, look for a vacuum leak that occurs while in gear. If the o2 sensor code is for a lean condition a vacuum leak could case it and the drivability condition /stalling you are getting. Hope this helps and rate me please!!