1990 f250 7.5 the injectors will not work replaced fuel pump ecm end the pick up coil in distributer and the ecm

The fuel pump and coil are on two different circuits.
The fuel pump is on the 20amp ECM fuse and the coil, ignition module, and injectors are on a 20amp fuse #10. But the ECM fuse could keep the coil and injectors from working.
You would need to test the fuses in the box in the engine compartment, and the fuel pump relay and coil for voltage and ground. The pump relay is grounded by the computer for 3 seconds when the engine is cranked.

A mechanic would check the injectors for voltage and for a ground signal from the computer.
The injectors get power from the EEC relay near the battery.
The ECM computer gets a signal for the coil and the injectors from the module mounted on the side of the distributor.

most likely fuel pump is out , It could be not pumping hard enough to get through the injectors. good luck

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.

did you check the fuel pressure pump on the frame rail for power and ground? have you verified no ignition spark to the spark plugs? have you checked for fire from the coil to the distributor cap? does the check engine light come on when you turn the key on? have you check for injector pulse and power at the fuel injectors? if the fuel pump won't come on and you have no ignition fire and no injector pulse, all of these systems are triggered by the ECM.

Hello! The ignition control module is defective. It is located inside the distributor, under the rotor...If there is no spark injectors are off...

The ICM is a flat black rectangular shape with 2 screws holding in place...2 connectors out of the bottom and 1 out of the top; Cost around $45...Inspect and clean all connectors.

Guru.............saailer


I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Replace the pick up coil if there is fuel to the injector.If there is fuel pressure at the injector,then it is the pick up coil.If the fuel pump is working,and the fuel filter is new,then there is fuel at the injector,just no pulse,correct?

Replace the module,it,and the pick up coil work together to pulse the injectors,and it does this threw the computer.

I have 1993 gmc 4.3 vortec v6 turns over but want start. replaced fuel pump, fuel pump regulator ,ecm, tps, coil

How do you know the fuel pump is not getting power?.The fuel pump only comes on for a second or two before cutting back off.The ecm only suppys power to the relay for a few short seconds with key in the on position.Only constant 12 volts is supplied when the engine is running.Is the fuel pump new?How do we know it is good?Also is the engine giving a spark when the engine is turning over?If the engine has no spark,then the pick up coil could be bad,otr the ignition module could be bad.Check the fuel at the injsctors or a fuel line to see if the fuel will pump out when the key is turned on,if it does not,then check to see if the ijectors are pulsing.If the injectors are not pulsing ,and you have spark,then remove the distributor and replace the pick up coil,and the ignition module.The pick up coil,along with the igniyion module give the injectors there pulse.One other thing,If the fuel pump is not for sure coming on,check to see if the relay is clicking on,and then off in a couple of seconds.If this is true,then replace the fuel pump.Any other questons,please ask,I will try to help if I can.I hope this was some help,let me know,thanks.