1997 Dodge Dakota 3.9L V6 Crank, No Start

When you turn on the key does the odometer say NOBUS? If so you need to start w scanning system to verify computer works. No communication signals blown fuse, possible body control module failure, or bad ground connections failed pcm. Gonna guess this got worse over time till it quit all together.

Pour a small amount of fuel into intake directly into engine less than a cup remove anything that will risk fire as engine may backfire out intake as fuel ratio becomes to lean. If it runs fuel pump. Scan twice replace once.

Things should be tested before you buy parts you don't need . You could have bought test equipment instead , now you're back to square one having to check for proper fuel pressure , spark and injector(s) pulse .

beatupchevy... The parts I have replaced on theis vehicle were due to testing. The spark plugs were worn, the wires were frayed, the power steering pump leaked, the belt was worn, the fuel pressure regulator was bad so I changed the entire housing so I would not have to rebuild the housing, the distributor cap and rotor had burn marks, the ignition coil was getting power, but no spark, which caused that replacement, catalytic convertor was rusted out and had holes, battery terminals did not hold battery, and battery was over 10 years old. Everything was replaced for a reason. I will be more specific next time when asking my questions, however, if you would not mind giving some productive responses instead of trying to troll someone and being a asshole, that would be appreciated. Carpentar... I appreciate the assistance and thoughts and will look into those once I am done with the training event I am at. And you are correct it did get worse over time. I am constantly gone with deployments and training and only get a day or two here and there to try and figure this stuff out. But again I appreciate the information.

So, you have no spark. The catalytic converter, for example, has absolutely nothing to do with that symptom. However the crankshaft position sensor does. If the computer doesn't know the engine is cranking it will not provide spark. The fuel pump was a waste of money too. Again, not related to the ignition problem. However the ignition switch could be the cause of the fuel pump not pumping and no spark. If the PCM doesn't know the ignition switch is on it will not enable the fuel pump or allow spark. If this vehicle has a security system your problem might lie there. It also sounds like this vehicle has been neglected. Frayed spark plug wires, a 10 year old battery with terminals so corroded the cables were falling off? Not the description of even a reasonably maintained vehicle! Good luck to you! Jim