corsa b running badly advice needed.

[CB125T]

Hi,ive got a corsa B 1.2 16v and yesterday it has started misfiring and sounds like its only running on 3 cylinders. It struggles to accelerate in any gear and shudders and judders aswell as makes a flapping sort of sound. The only way ive found to clear it is give it a 90mmoph drive down the mway but it does still come back.

Any advice on what it could be?

[CB125T]

Is that easy/cheap?

[CB125T]

Thanks guys reckon i can last until next friday like it using the car daily? got to wait until payday

No engine management lights on but then not a lot of things work on the dash...