I'm trying to get my 318i sedan roadworthy but it has no spark to cylinder #3. I initially thought I had a bad coil pack so I bought a used set of 4. I tried all 4 and none of them would put out spark. I connected these 4 coils to other connectors coming from the ecu and they all worked and I even swapped plug wires around. It seems as if whatever coil is plugged into the #3 plug from the engine harness, doesn't fire.
I tested the 3 pins at the coil plug. I have switched power, ground, and good continuity from the pin on the plug to the ecu connector. After that, I swapped in a used ECU from a friend and there is still no signal on coil #3.
I'm not sure what else to check. Any advice would be appreciated. Thanks.
I tested the 3 pins at the coil plug. I have switched power, ground, and good continuity from the pin on the plug to the ecu connector. After that, I swapped in a used ECU from a friend and there is still no signal on coil #3.
I'm not sure what else to check. Any advice would be appreciated. Thanks.
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