GOLF GTI Mk1 DX Heavy jerks.

Hello!

I need help.

Here is my problem.

The car starts to do heavy jerks (shakes) when it is moving. See my video attached. It doesn't matter in which gear. The point is that it only happens when it is moving, but if I'm in neutral or with my clutch press, the rpm goes up normally. Maybe not 100% smooth, but without any jerks.

I've already changed.

- Sparks
- Distributor cap
- Fuel filter
- Distribuitor rotor.
- Coil
- Sparks wires

What's happening?

Could it be the Vaccum Advance?



(My video is made in Catalan. It starts in 1st gear and goes up till 3rd gear)

chek your ground wires between the engine and chassis
My problem was i painted underneath the wire nut and it started jerking almos to a poin i did not want to drive it anymore but had to go home. after i took the paint off it was gone. So maybe the wire is alost trough.