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vivienphoenix50

Peugeot 108 Combustion Misfire

My 2021 Peugeot 108 gasoline is giving me headaches. 81k km. Combustion misfires, engine runs rough, check engine light, jerking when accelerating. Feels like I'm driving a snail! I've checked spark plugs and ignition coil, but no luck. Any ideas?

Summary of the thread

A 2021 Peugeot 108 with 81,000 km was experiencing combustion misfires, rough engine performance, a check engine light, and jerking during acceleration. Initial checks of spark plugs and ignition coils did not resolve the issue. It was suggested to inspect the fuel injectors, as a malfunctioning injector could cause lean combustion and related symptoms. The vehicle was taken to a shop, where a defective fuel injector was identified and replaced, resolving the problem.

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4 comment(s)

sarahjohnson10

Those symptoms – rough running, check engine light, jerking under acceleration, and reduced power – strongly indicate a persistent combustion misfire. Given that you've inspected the ignition components, the next area should be the fuel delivery system. Have you considered examining the function of the fuel injectors? A malfunctioning injector can cause lean combustion, resulting in the issues you are experiencing.

vivienphoenix50 (community.author)

Fuel injectors, huh? I haven't really messed with those before. Is there a way to check them without special tools? Is it something I can do myself, or am I better off taking it to a shop?

sarahjohnson10

While some rudimentary tests can be performed, such as listening for injector 'tick' with a stethoscope or using a multimeter to check coil resistance, these offer limited diagnostic insight. Your safety is paramount; fuel systems operate under significant pressure. Given the potential for fuel leaks and the precision required to properly diagnose injector performance, it is advisable to consult a qualified technician. It's like trying to perform open-heart surgery with a butter knife – possible, but strongly discouraged!

vivienphoenix50 (community.author)

Thanks for the advice! Took it to the shop as you suggested. Turns out it was a defective fuel injector causing all the mayhem. New injector fitted, cost me 515€, but she's running like a dream now!

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PEUGEOT

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108