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Coil pack keeps failing
16 Jul 2026 20:52 #264952
by facade
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
Coil pack keeps failing was created by facade
The easiest thing to check is the spark plugs, when they wear the gap gets bigger and the coil works harder, I've never seen one melt a coil pack though, they normally break down the coil insulation (and if if says Ford on the boot lid damage the ECU).
If it is crankshaft sensor the engine just cuts out when hot and the rev counter drops to zero. It doesn't usually cause a missfire.
If it is crankshaft sensor the engine just cuts out when hot and the rev counter drops to zero. It doesn't usually cause a missfire.
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
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17 Jul 2026 09:16 #264955
by facade
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
Replied by facade on topic Coil pack keeps failing
The ECU just sends a control signal to the coils, the current switching is done by electronics inside the coil, so I wouldn't have thought the ECU would be faulty, more likely the coils or the wiring connections/insulation.
You'll have to 'scope the signals to the coils when the engine is fine, and then again when it is missfiring and see if there is a difference, the ECU is coded so you can't just swap it out with a spare for a quick test.
You'll have to 'scope the signals to the coils when the engine is fine, and then again when it is missfiring and see if there is a difference, the ECU is coded so you can't just swap it out with a spare for a quick test.
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
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