My 1.6 petrol roomster has started to missfire and judder under load. 4th gear low revs full throttle it judders, the power rises but it keeps cutting in and out. If I keep it in high revs then it doesn't do it as much or not at all, below 2000 it keeps cutting out. Full disclosure 145k miles on original clutch. I've had cars with worn out/contaminated slipping clutch and it doesn't behave like that. Never touched the injectors either. No lights on the dash, no codes on VCDS. Any idea before I start with spark plugs, leads etc? Thanks

I'd start with the leads, I had occasional misfires caused by corrosion on the caps. How old are the plugs?

On 17/11/2025 at 16:40, moleinaroomster said:

I'd start with the leads, I had occasional misfires caused by corrosion on the caps. How old are the plugs?

Original coils. I've ordered 4 new ones and spark plugs.

It was the coil plugs 👍