Verso engine jerking and power loss

Hey, rough running and check engine light on a Verso could be a few things. The jerking definitely points to misfires. You said ignition coil – that's possible, but have you noticed any difference in fuel consumption? Misfires can also be caused by fuel delivery issues. Maybe a partially clogged or faulty fuel injector? Or even the fuel pump not providing enough pressure?

Fuel consumption seems normal to me. How can I tell if it's a fuel injector problem without ripping everything apart? Is there a way to test it? Could a fuel pump cause this only under acceleration?

Testing fuel injectors properly usually needs some specialized equipment, like a diagnostic scanner that can monitor fuel trims and injector pulse widths. A failing fuel pump can struggle more under load, like when accelerating, causing the misfires. Given the symptoms, especially the jerking and power loss alongside the check engine light, it's a bit difficult to pinpoint without proper diagnostics. Best to get it checked by a workshop. They can properly diagnose the issue. It might turn out to be something else completely.

Thanks for the advice. Took it to the workshop, and you were right; turned out to be a defective injection valve. Repair cost me 515€. Runs smoothly again.