Cranks but no spark

Does your scanner have live data? If it does can you monitor the RPM when cranking the engine over? When it is cranking you should see something happening. You may see a reading like 300 RPM's as an example. Would you be able to see that data for us? Let us know please.

Okay, reading is good. Indicates the crank sensor is picking up a signal. Check continuity from pin #6 at the distributor which it appears it should be a blue wire with orange stripe. To the engine control module connector pin #21 blue wire with orange stripe. If you have continuity as we talked about earlier in the post about continuity checks, with both connectors unplugged, leave the probe on pin#6 of distributor and the other lead probe the battery ground cable. If you have continuity then the wire is shorted to ground and you would need to see where the wire is shorting out. If no reading is measured then the lead at the ground cable move it to the positive cable. Same thing as the ground test, if you measure continuity of 1 ohm or less then you have a short to power and you would need to trace the wire down to see where it is shorting. Let us know what your readings are.

How is the PCM relay? do you have power at fuse # 10, 2,1 and 8? Here are the engine wiring diagrams to help see how the system works. I would check all power and grounds and if okay replace the PCM. Here is a guide and the engine wiring diagrams below:

https://www.2carpros.com/articles/how-to-check-wiring

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Sounds good, let us know.

Looks like your on the right track here. Pin #17 is good since we established you have power at pin#2 at the distributor. That power is supplied by the PCM on circuit 702. If you were trying to measure power with the PCM unplugged then there would be no power flowing at that wire. All the tests are looking good. We need to narrow this down to a faulty crank position sensor or a faulty PCM? Will gather more information here but I would say replace the crank sensor if the part is not that much. Local parts store like AutoZone or O'Riley have there house brand with lifetime warranty.

I am going over some information on pin point test JA of the service manual. I need to see if the RPM is recieved from the cam sensor in the distributor or the crank sensor itself and if it has any other purpose other then misfire monitor and timing adjustment? I will try to get back to you later in the evening.

Inspect the crankshaft position sensor harness. It is 3 wires. Look for a green wire and blue wire to identify the 2 pins you need to measure resistance. Once you identified the 2 pins remove the crankshaft position sensor and measure the resistance across the sensor Male pins. You should measure 520-580 ohms. If you are not near this spec then the crankshaft sensor is bad. If it is good then it is looking more like a PCM issue or wire barness issue. Let us know what resistance you measure and upload a picture of the measurement if you can please. If you have any questions on this measurement do not hesitate to ask.

Sorry for the miscommunication. It is the crankshaft position sensor itself on the Male pin side you need to take measurements. Measure the sensor side and post the results please.

Looks like you did measure it correctly. I got worried you had measured at the PCM wire harness side. So yes the measurement looks really good. On the PCM connector side measure the circuit continuity now. Measure the green wire at harness connector to PCM connector #15 and blue wire to PCM connector pin #16. You should measure under 1 ohm.

With the PCM unplugged do the same measurements to the positive and negative cables to check the circuit for short to power and ground. If good measure between the blue and green wire to make sure the 2 wires are not shorted together. If all is good it is starting to look like a PCM issue.

If you can post a picture as to how you tested the 2 wires just so there is no miscommunication that would be helpful. And yes, all the testing and measuring for shorts and open circuits is to rule out any wiring faults that could be causing the PCM to interpret any wrong signals.