No power to the distibutor or fuel pump or ecm

Missing problem requires to check the following systems and components:
1. Fuel system. (Fuel pump, fuel filter, fuel injectors).
2. Ignition system. (Spark plugs, spark plug cords or wires, ignition coil, distributor (cars with distributor type ignition system, rotor, distributor cap, ignition amplifier), Coils On Plugs (COP) and correct sequence of the spark plug wires and or Igniter connectors.
3. Air leakage in the intake manifold.
4. Detached vacuum hose.
5. PCV Valve.
6. Servo brake booster pipe or diaphragm.
7. Valve clearance.
8. Cylinder compression.
9. Contaminated fuel.
10 . ECM.

You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

Cylinder #2 is the the second spark plug counting from the right to left.
EX.Below are spark plug on engine
engine
-------------------------------
' (oil cap) '
' (4) (3) (2) (1) '
'_________________'

Your misfire can be cause by couple of things but the cheapest way that you can try to fix your car is to do a tune up by replacing:
1)all spark plugs
2)do a oil change
3)spark plug wires
3)distributor cap and rotor

note misfire can be cause by:
1.bad gas
2.spark plug and/or wire
3.distributor cap and/or rotor
4.valve adjustment
5.injector
6.off timing
7.ECM
8.bad wiring(power, ground or feed line)

ignition module inside the cap and rotor assembly

the crankshaft position sensor located between flywheel and trans is where the power source for the coil comes from. I suggest you need change that

IF YOU GOT GAS ENGINE.PROBLEM COULD BE STOPPED UP FUEL FILTER OR WEAK FUEL PUMP.LOW ENGINE COMPRESSION.BAD SPARK PLUG + WIRES + ROTOR AND CAP ALSO BAD COIL CAUSING WEAK SPARK.IF YOU HAVE DIESEL ENGINE SLUGGISH.PROBLEM COULD BE RESTRICTED AIR FILTER DIESEL.INJECTION PUMP TIMING OUT OF ADJUSTMENT.FAULTY EGR AND EPR VALVES.RESTRICTED EXHAUST SYSTEM STOPPED UP MUFFLER PLUGGED FUEL FILTER.PLUGGED FUEL TANK DUE TO FAULTY FUEL CAP.MISSING PROBLEM COULD BE CAUSED BY DIRTY OR FAULTY INJECTORS. THE INJECTION PUMP TIMING OFF. AIR IN FUEL.OR FUEL RETURN SYSTEM RESTRICTED.STOPPED UP FUEL FILTER.OR USING INCORRECT FUEL OR ITS CONTAMINATED.

Check fuses relays and ground wires. The check inside the distributor cap and make sure the piece the rotor inside distributor is clean of oil and the area below hall effect is dry and without oil.The piece down below is also a item that can effect it from firing.it is a magneto and it controls the firing and fuel by sending signals to the ecm. If you check the above without finding an issue the best thing to do is see if you can borrow a scan tool to get any codes that could be helpful with diagnosing. Im sorry if this isnt exact help but it is trail and elimination that fixes issues like this instead of just replaceing parts.

vacuum advance working ? do manuel check with cap and rotor button off and see if it's moving. chris

it could be the ecm"computer" that can cause know spark and know gas at the same time.

More than likely it's the distributor. They have a tendency to build up corrosion and rust and have personally went through the same situation three weeks ago on a suburban. Check to see if you are getting spark from the distributor first. Have the ecm in the distributor checked at Oriellys for free. It's under the rotor and has two 8mm head bolts with wires plugged in at each end.