RE: no spark 98 dodge ram 318
Your truck has a crank sensor, if your standing in front of the engine reach behind the left rear corner of the intake manifold, its there.
if the sensor went bad, you wont get a spark anyway (coil will have no volts) the crank sensor tells the PCM if the engine is actually turning or not. also, check if your fuel pump went dead. you should at least hear some buzzing in the gas tank when you turn the key all the way forward. if you hear it, you need to check the pressure on the fuel rail the a high pressure fuel gauge. if no sound coming from the tank, check all relays under hood. sounds like the crank sensor, but it could be a fuel pump ($$$) good luck