Misfire + Power Loss: Fix Your Kalos Quick Guide

Had almost identical issues with my 2014 Chevy Spark last month. The symptoms matched yours exactly, rough idle, jerking during acceleration, and the engine misfiring consistently. Turned out to be a faulty fuel injector causing incomplete combustion in cylinder 2. The cylinder misfire diagnosis revealed that fuel wasn't being sprayed properly, leading to inconsistent combustion. Needed a complete fuel injector replacement since cleaning didn't resolve the issue. It was a serious repair that required proper diagnostic equipment to pinpoint the failing injector. Key warning signs that helped identify the fuel injector problem: Rough idle, Drop in power, Engine misfiring at specific RPMs, Failed emissions readouts If your symptoms match these, definitely get it checked soon. A faulty injector can lead to catalytic converter damage if left unchecked. The fuel pump and other injectors were tested during diagnosis to rule out related issues.

Had similar symptoms with my Kalos a while back. Started with rough idle and progressed to complete combustion misfire issues. The spark plug wiring and ignition coils were shot, also found the fuel pump was starting to fail which made the problems worse. Would be curious to know what you ended up paying for repairs and if you've had any other problems crop up since then? My fix wasn't cheap but the throttle response and overall performance is much better now. Always good to know what to watch out for with these models.

Got the car back from the shop last week and it's running like new now! The combustion misfires are completely gone. They diagnosed a defective injection valve that was causing all those rough idle and jerking issues we discussed. The repair bill came to 515 € for replacing the faulty fuel injector. Worth every penny though, the throttle response is crisp again and that annoying vibration at idle is history. Haven't had a single check engine light since the fix. Glad I didn't wait longer to get it sorted. The mechanic mentioned that running with a bad injector could have eventually damaged the catalytic converter, which would've been way more expensive to replace. Engine runs super smooth now, especially during acceleration. Haven't noticed any other issues since the repair. It really was just that one problematic fuel injector causing all the drama. The engine misfiring completely stopped once they swapped it out.

Finally took my car to a different mechanic after getting your advice. The cylinder misfire was exactly what you described, turned out to be both spark plugs and ignition coils needing replacement. They also found the throttle position sensor was acting up, which explained the jerky acceleration. Total bill came to around 650 Euro for parts and labor, but honestly worth every penny. The rough idle is completely gone and acceleration is smooth again. No more check engine light either. Way better experience than my last mechanic, these guys actually showed me the worn parts and explained everything. Good to know about watching for catalytic converter issues. Going to keep an eye on things, but so far the engine's running perfectly. Really appreciate everyone sharing their similar experiences, helped me know what to expect and not get taken for a ride at the shop.