Technical Coil pack.

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Technical Coil pack.

Fiat headache

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Oct 13, 2024
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Hi people.

I have a problem with my Fiat 500 L pop.
The year is 2013.

The car runs rough on idle and has poor acceleration. A flashing engine management light on and poor fuel economy.

I have had a look and scanned into the ecu. Cylinder 2 misfire.

When I looked at cylinder 2 the coil back had been burned up. Only 1 out of the 4 coilpacks had burned up.

I replaced the spark plug and the coil pack hoping this would remedy the issue.

Same problem. It burnt the coil pack up.
I have had a look at the the harness and I can not see any obvious damage to the harness.

I have a multimeter but I haven't used it yet I was wondering if there was a common issue. What's my next step? Check the harness or is it something else.

Please advise.

Thank you.
 
Model
Fiat 500 L Pop
Year
2013
Mileage
79000
The coil pack is a transformer, so it'll step up the voltage it receives from the battery. The only way that a single coil can get burned up like you describe is if its receiving more than 12V.

The step up ratio is the same no matter what voltage it receives, so as an example:

Your coils 1, 3 and 4; receive 12V and step it up to 20,000V
Your coil 2; receives 24V and steps it up to 40,000V - causing a burnout.

Ergo, check the wiring to coil 2.
 
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