Atlas Engine Misfires: Early Warning Signs & Solutions

I encountered a similar issue with my 2015 VW Tiguan. Having some experience working on VW engines, the symptoms you describe sound very familiar. My car showed identical symptoms, rough idle, misfiring, and jerking during acceleration. After taking it to the workshop, they discovered a significant leak in the exhaust system near the manifold, which was causing incorrect readings from the oxygen sensor and affecting the fuel mixture. The repair involved: Complete diagnostic scan, Smoke test to locate the exhaust leak, Replacing the damaged exhaust components, Clearing the engine codes Total cost came to 265€ for parts and labor. Before jumping to conclusions about fuel injectors, it would help to know: Does the engine noise change when revving? Are you noticing any exhaust smell in the cabin? What error codes specifically came up in the scan? Have you noticed decreased fuel efficiency? The ignition coil could also be causing these symptoms, so getting these details would help narrow down the exact cause. The fuel pump and air filter should also be checked as part of diagnosing the misfire issue. Consider having a proper diagnostic done at a VW specialist who can perform a pressure test on the exhaust system.

Thanks for sharing your repair experience. After checking my service records from 148004km, I can confirm having very similar symptoms. In my case, it turned out the spark plugs were completely worn and two ignition coils had failed. The rough running and misfires cleared up completely after replacing all spark plugs and coils. My repairs included: New set of spark plugs, 2 ignition coils, Diagnostic scan Total repair cost was 320€. The fuel injectors and crankshaft sensor were also tested but worked fine. Engine runs smooth now with no more check engine light or jerking during acceleration. Would recommend getting the ignition system checked first before looking at more complex issues like fuel system components.

Thanks for the follow-up about your Atlas repairs. Your experience matches exactly what I found with my Tiguan, ignition system issues are often the culprit with these symptoms. After hearing about your successful repair, I should mention that I later had the remaining ignition coils fail within 6 months of my initial exhaust repair. Would have saved money replacing all coils at once, since they tend to wear at similar rates. The spark plugs in these VW engines typically need replacement between 90000-120000km. A quick tip: While doing the ignition coil replacement, its worth checking the air filter and having the fuel injectors inspected. Poor air flow or clogged injectors can cause similar misfiring symptoms and its good preventive maintenance. Good to hear your Atlas is running smoothly again. The 320€ repair cost seems reasonable for the work done, especially considering the diagnostic time needed to properly identify the failing components.

Thanks for all the detailed feedback. Looking at my scan results again, it seems you're both on point. I went ahead and had my Atlas checked at the shop today. The diagnosis revealed failing ignition coils just like you experienced. The repairs included: Full set of ignition coils, New spark plugs, Fuel injector cleaning service, Complete diagnostic scan Total came to 395€. The timing belt was also inspected but still in good condition. The crankshaft sensor readings were normal, confirming the issues were isolated to the ignition system. Really glad I asked here before assuming it was a major fuel system problem. The car runs perfectly now, no more misfires, jerking, or check engine light. Running smoother than it has in months, especially during cold starts. Good tip about replacing all coils at once. Makes sense to do preventive replacement rather than dealing with multiple shop visits as they fail one by one.