Engine coil

[AP7]

My 2016 1.2 turbo was missing  firing about 8 months ago fault was diagnosed coil 4 which I changed. No problems until today same problem. Has anyone had this issue.

[Bper]

Hi Amish,It sounds like a recurring issue. Since you replaced coil 4 and the problem has come back, I would check the spark plugs,they might be worn out. Look for any damage or loose connections.Other coils might also be going bad. A weak Battery or poor grounding can cause misfires as well. If the same cylinder (coil 4) is misfiring, it could be an issue specific to that cylinder. Run a scan it may help pinpoint the problem.👍

[TonyHSD]

Swap the coils 4 with 3 for example. If the fault code moves to coil 3 then it’s from the coil itself. Replace again and put a new set of spark plugs. 
If the fault remains in cylinder 4 then it’s from something else. Coolant, oil or fuel leak are most common issues that can cause misfire. 
 

[AP7]

On 9/10/2024 at 4:55 PM, TonyHSD said:

Swap the coils 4 with 3 for example. If the fault code moves to coil 3 then it’s from the coil itself. Replace again and put a new set of spark plugs. 
If the fault remains in cylinder 4 then it’s from something else. Coolant, oil or fuel leak are most common issues that can cause misfire. 
 

Thanks 

[AisinW]

Coil pack is expensive and always use original Denso coil. Buy Denso sparkplugs from reputable seller, careful with online shop and can destroy engines with fake Denso sparkplugs.