Replaced fuel pump. module/coil, new fuel filter, getting spark, but back fires through engine exchaust. firing order of plugs correct, But after priming engine throttle with ether, car only back fires and wont start. Cant seem to get engine to fire or get gas to the engine

1987 rangers use a device called a TFI module to control ign. timing , this merely triggers a std. coil to fire the center port of distributor cap , this device only controls the coil to fire but does send a pulse for timing back to ecu this sets the base pulse for fuel injection , but its also affected by manifold Air flow and exhaust O2 amounts (closed loop) , but engine should run in base mode (open loop) fuel timing (but not well) , fuel pump relay is enabled to run via ECU output , Now your year ranger had a tech bulletin out on fuel pumps , seems they had a problem getting them to work after a fuel filter was replaced , something about a false backpressure , no if you have no/low fuel pressure then id look at fuel pump power 1st then fuel pump itself assuming you've already tried a new filter of course

I would look into replacing the coil even though it is sending spark it might not be enough and I would go through and just double check all my wires as well as the firing order because if it's off just a little it will make the car run rough

See diagram

100 psi per cylinder is way too low--should be in the vicinity of 150-165 per cylinder
back firing indicates wrong firing order and as you have replaced the plugs etc check that you have the leads on the correct plugs in the correct order
the timing for the engine should be around the 10 degree btdc and not tdc

How about no spark or did you screw up the firing order when you replaced the plug wires? It is easy to do.Typically there are 2 things to get an engine to fire that's fuel and spark. other things will make it run bad but not even a short rumble when you use starting fluid, there is no ignition. Get a spark test tool from the auto parts store. Check the firing order and be sure your wires are in the correct order.

honestly, sounds like you should go to basics-check compression first, clean the throttle body , check fuel pump pressure at the rail on top of the engine-if you have any kind of check engine light, you need to get the code pulled, you have an OBDI system, so it is not as easy to diagnose-another basic is having good electrical power-battery and alternator in good condition.

HI. There are several areas of concern here. I will list them below. Check all areas stated in the list for faults.

Possible cuases:

1. Incorrect firing order set. On the 2.0, 2.4 and 2.7 engines. These engines are equipped with a distributor-less ignition system. This system incorporates a coil pack assembly, along with wire sets. In order for the assembly to fire correctly, the order of the wires must be set to the proper sequence. if not, the engine will not turn over, or start correctly. Make sure your firing order is correct, and make sure you have not placed a particular wire set into the wrong cylinder. I will post a picture of the correct firing order for your engine, below this list, shortly.


2. Incorrect spark plug gapping procedure. If the new spark plugs were gapped incorrectly, this will not allow for proper spark, thus, preventing optimal combustion, due to lack of fire. Check the spark plug gap using a wire gap gauge, and adjust if necessary. The gap should be 0.039-0.043 in. (1.0-1.1mm)

3. Failed coil pack assembly. This will be the worst case scenario. The coil pack supplies the necessary current that fuels each plug. The current is transferred, via wire sets.This will be the culprit if all the above areas are proven to be operational, and in good shape.

4. Failed wire sets. Replace the wire sets if faults are found at the connector at the ignition coil pack, or at the plug boot.



NOTE*
In order to provide the correct firing order for your engine, i will need the engine size and liter information, if possible. Please post this information, asap. Thanks..

It need to have fuel and sparks to start.
Have you check to see if there is spark after all new parts?
If there is spark, then check if it has fuel.

To check spark, hold 1 spark plug touching engine chasis while cranking, if there is no spark then problem with the coils or ignition module.
To check fuel, after cranking several times but no firing, take out a spark plug to see if it wet.
If it is dry then no fuel. For this, problem could be following in order:
-Fuel filter
-Fuel pump
-Fuel pressure regulator
- Fuel injectors
- Fuel injector module.
Need to go through troubleshooting step by step before changing the parts to correct a problem. Good luck in finding a good mechanic to test before spending money in costly partts replacement.

Here ya go!

Here's the firing order: