1985 3.2 with a no start issue. Drove it to work, no problems. Drove it home from work, no problems. 2hrs later go to take it out and no start. It'll turn over, but there's no spark. Here's what I've done so far:
1. Swapped DME Relay
a. Did this with 4 relays, just to be sure. Just to be EXTRA sure, I bought a new relay – no start. Then I bench tested all 5. One was bad, but not the one that was in the car at the time of the original no start.
2. Jumped the fuses to confirm fuel pump turns on – it does, no start
3. Jumped the pins on the DME Relay wiring harness – no start
4. Check the coil with the multimeter
a. 12v at the coil
b. Primary and secondary all within spec
c. Swapped in a spare coil (also within spec) – no start
d. “Borrowed” an MSD coil from Amazon – in spec and still no start
5. Checked Ohms on the Speed Sensor – all good, no start
6. Checked Ohms on the Reference Sensor – all good, no start
7. Checked Ohms on the Cylinder Head Sensor – all good, no start
8. Pulled out the factory manual and proceeded to:
a. Run all fuel delivery tests – all good, no start
i. Yes, fuel pressure too!
b. Run all ignition tests (including above tests already performed) – all good, no start
c. Did full pin-out testing on DME harness – all good, no start
9. Replaced Speed & Reference Sensors
a. Yes – gap set to 0.8mm
b. Double checked my work with the LED test – all good, no start
10. Pulled my DME
a. Checked every mm of the board for any cracked solder joint – all good
b. Checked every component for attempting to release the smoke – all good
c. Put DME back in – no start
d. Pulled DME out again, just in case I missed something – currently sitting on the bench
11. Somewhere in the above testing, I also bought a pocket oscilloscope to “up my testing” abilities on the sensors. I’m not exactly scope savvy, but the waves all looked good to me.
12. Only thing I haven’t done, that I’m considering is replace the fuel pump and one way valve, but that shouldn’t be spark related.
13. Ran out of things to test – jumped on Pelican to plead for help. I have pics or vids of just about every step above, including inspecting the DME boards. Let me know what you need to help diagnose. I'm sure there's other tests I've forgotten to include above (e.g. all fuses tested).
TIA