Cranks No Start

Sounds electrical.

When it doesn’t start check to see if the pump is running or not. If not… then it’s either the pump or the relay or the circuit triggering the relay, or something in that chain.

If the pump is running… then it’s probably something related to the EFI system.

RagnarKon

Sounds electrical.

When it doesn’t start check to see if the pump is running or not. If not… then it’s either the pump or the relay or the circuit triggering the relay, or something in that chain.

If the pump is running… then it’s probably something related to the EFI system.

Thanks It started up fine a couple times drove it to work and back and then tonight went to start and all it did was crank.

RagnarKon

Sounds electrical.

When it doesn’t start check to see if the pump is running or not. If not… then it’s either the pump or the relay or the circuit triggering the relay, or something in that chain.

If the pump is running… then it’s probably something related to the EFI system.

Thanks It started up fine a couple times drove it to work and back and then tonight went to start and all it did was crank.

It definitely sounds like a relay to me... relays are electromechanical components and the mechanical portion of it wears out over a long period of time. But obviously I can't say for certain.

Thank you that will be my next step to ck

I've not had any problems like this on my '96 but if it is cranking over but not starting, it has to be a fuel or ignition problem. Easiest to check is fuel. Get a fuel pressure gauge and connect it to the fuel rail. If you are not seeing about 40 PSI before or during cranking, there is a fuel delivery issue. If the fuel pressure is good, then an ignition problem is suspected. Both of these can be contributed to the ECU that is now at least 26 years old. There is some great information on the FullSizeBronco forum. 1980-'96 Bronco Tech | Bronco Forum - Full Size Ford Bronco Forum (fullsizebronco.com).
One of the first symptoms of a failing ECU is that the fuel pump relay doesn't turn off after 5 seconds when the key is turned on and the engine isn't running and has not attempted to crank. One other easy thing to check is the fuel pressure regular. If there is fuel in the vacuum line when you remove it, the regulator is bad.

I was having a problem very similar. I installed a new ICM and it hasn't done it all day today. Last night I couldn't get out of the driveway without it dyeing and not wanting to start. I'd let it sit 10 minutes and it would start. Run for 5 minures and start the whole process over again