Did you try swapping the plug with another cylinder too?

Take a compression test also.

Answered by Wrenchtech (expert)
14,829 answers provided

first of all, you missed the obvious. try changing the spark plug and I bet your issue with the 304 is gone

if you disconnected the pcm, you now have to have the pcm re flashed or re programmed. you ereased the memory in the pcm.

Roy

Answered by ASEMaster6371 (expert)
24,973 answers provided

You shouldn't have any programming problems with the PCM. It will lose the adaptive memory and any codes stored but that should be all.

Answered by Wrenchtech (expert)
14,829 answers provided

Changed the spark plugs with the new coil with no improvement. Compression is good. Did not disconnect the PCM - just detached it from the firewall (plastic fingers).

Response from bschrum
1 question asked

If the spark is good, compression is good, that only leaves the fuel injector. You can try moving that injector to a different cylinder to see if the misfire moves with it.

Answered by Wrenchtech (expert)
14,829 answers provided

Thought about the injector too. I was probably not clear. I changed the spark plugs but still have no spark out of four. I put a plug in the coil out of the cylinder to check that. Checked all the voltages on the plug but not sure if I am seeing pulses on the green wire. That is the wire that goes back to the PCM. With all the other issues (door locks, driver's window, and radio) I am still wondering about the plug going into the PCM.

Response from bschrum
1 question asked

If you have power and pulse to the coil, you should have spark if the coil is good, assuming you are grounding the spark plug or using a spark tester which is what you should be doing.

Answered by Wrenchtech (expert)
14,829 answers provided

I know I have power and ground but I am not sure if I have pulse to coil. Any down and dirty way to test that?

Response from bschrum
1 question asked