1989 mustang it just cranks will not start ,, i changed cap/rotor plugs and wires tfi module .fuel pump and filter . fuel relay it has spark and fuel.. if i spray starter fluid it will start then shut off. any help will be thank full . joe

Have your ignition module checked, my car would start and drive and would go dead after a few miles and would not start until it cooled down, turned out to be the ignition module that eventually went bad and would not start at all.

You might check for a fuel shut off valve. Some vehicles have them in case of an accident, it turns off the fuel pump. Some are just a relay that can be reset.

Hi there,

First thing you'll need to check is your fuel pump. Being that your guage sending unit is on the pump assembly, this would be a good place to start based on your symptoms. Check to make sure your fuel pressure is in the normal operating range, and check the wire connections leading to the fuel pump for any corrosion, looseness, grounding, etc. Make sure that when you turn the key to the on position before starting, that you can hear the "whirring" sound of the pump for several seconds. You may have a pump on it's way out, and you were fortunate enough to get a warning before it went out completely and left you stranded somewhere... :)

Thanks for your vote!

D

Re-check the basics . Does the distributor rotor rotate while cranking?Note: Distributer cap must be removed. Does the vehicle have enough available spark to plugs? Do we have enough fuel pressure 30-35psi min.? With a 12volt test lamp
check for power to fuel injector while cranking. one wire should
remain lit and the other one should blink.
NO ROTOR ROTATION = worn distributor gear,or timing belt failure.
NO SPARK= bad module,coil,no voltage to coil,or faulty PCM
RELAY.

I’m happy to assist further over the phone at https://www.6ya.com/expert/richard_9a19ee73dfa4686a

try and see if the timing is off a notch

Hello Ford Cobra.
Strange the fuel pump stays running as soon as the key is on.
This is leading me towards a possible relay problem that is also affecting the power relay that powers up the injection system.
Is there power to the ignition coil momentarily as the key is turned on?
If so the power relay is working and will lead to the next diagnosis step.
Keep me informed.

KL

Are you getting spark to the plugs?? Take off a plug wire and put close to block 1/2" or so)and have someone crank engine-- is there spark?? if yes check ur fuel system--Fuel system could be plugged( filters) or worst fuel pump .

It may be your ignition module.

Has the truck had a tune up?
Check the TFI module or replace it should be bolted to bottom of distributor. Replace cap, wires, plugs, rotor button and coil.
(TFI modules during the 80's and 90's failed when it got hot.)

Check fuel pressure. Could be fuel pump witch is in the tank and replace the TFI module located under the distributor.