Yes, the PCM can cause a single coil to fail since each coil is controlled by individual pins on the PCM. If the pin for that specific coil is damaged, it won’t fire.
Zuri said:
Yes, the PCM can cause a single coil to fail since each coil is controlled by individual pins on the PCM. If the pin for that specific coil is damaged, it won’t fire.
Exactly. I had a similar issue, and it turned out to be a damaged PCM pin. Testing the output voltage at the PCM pin can confirm this.
Before replacing the PCM, check the wiring between the PCM and the coil. A loose or damaged wire can cause the same issue. A pinout diagram will help trace the connection.
Nicole said:
Before replacing the PCM, check the wiring between the PCM and the coil. A loose or damaged wire can cause the same issue. A pinout diagram will help trace the connection.
Here’s a link to an ignition coil wiring kit: Amazon link. It might be what you need if the wiring is the issue.