T-Roc Ignition Problems: Bad Coil Pack Warning Signs

As someone with decent experience working on VWs, I dealt with very similar symptoms on my 2016 Golf with the same engine family. The engine hesitation and rough running you describe matches exactly what I experienced. After noticing misfire symptoms and jerky acceleration, I took it to my regular workshop. The diagnostic revealed a faulty connection between the wiring harness and one of the coil packs. The rubber boot had deteriorated, allowing moisture to create poor contact. The total repair cost was 95€, which included testing and fixing the connection. The mechanic also inspected the remaining coil pack connections as a preventive measure since coil failure often happens in sequence. Before suggesting specific fixes, could you share: Current mileage on your T-Roc, Whether the check engine light is solid or flashing, If the symptoms get worse during wet weather, If the ignition system has had any previous repairs These details would help determine if you are facing the same ignition system issue I encountered. While coil packs are a common culprit, proper diagnosis is important since similar symptoms can come from other components.

Had my last service at 47000km, just three months ago. The check engine light is flashing, and yes, the symptoms definitely worsen in humid conditions. Have not had any ignition system repairs before. The engine stalling seems most noticeable when the engine is cold, especially during the first few minutes of driving. The rough running and engine hesitation smooth out a bit after warm-up, but the misfire is still clearly noticeable under acceleration. The symptoms match up with what youve described perfectly. Will get it checked by a certified workshop this week. Thanks for the detailed breakdown of your experience, really helpful to know the repair might be relatively straightforward and budget-friendly.

Good to hear back about those details. Your symptoms align exactly with what I experienced, especially the cold-start issues and sensitivity to moisture. Since you mentioned the flashing check engine light along with the misfires, this strongly suggests its the same ignition system problem I encountered. The fact that your symptoms improve slightly after warm-up but persist during acceleration is another classic sign of coil pack issues. What likely happens is that the heat temporarily improves the faulty connection, but the increased load during acceleration exposes the underlying problem. In my case, the engine hesitation completely disappeared after the repair. Just make sure the workshop checks all coil connections thoroughly, when I had mine fixed, they found early signs of wear on a second coil that could have failed soon after. One preventive tip: since your T-Roc has similar mileage to when mine developed these issues, consider having all coil boots inspected and possibly replaced as a set. This might cost more upfront (around 180-250€ for a complete set) but could prevent future engine stalling and repeated workshop visits. Keep us posted about what the vehicle diagnostics reveal. Based on the matching symptoms and conditions, Im fairly confident youll find the same root cause.

Thanks for the thorough feedback. The symptoms definitely match what youve described, especially the cold-start issues and moisture sensitivity. My T-Roc currently has just under 50000km, and yes, the check engine light started flashing several days ago. The engine stalling and hesitation during cold starts have been quite concerning. I called a local workshop and booked an appointment for vehicle diagnostics tomorrow morning. Based on the similarities with your case, Im feeling more confident this is likely a coil pack issue rather than something more serious. Might follow your suggestion about replacing the full set of ignition coils if thats the confirmed diagnosis, makes sense to prevent future problems even if it costs a bit more upfront. Will update the thread once I get the official diagnosis. Really appreciate the detailed information about costs and repair specifics, helps set realistic expectations for the workshop visit.