Help ! Engine is shaking

[h100vw]

The MK4 ECU isn't that bright and doesn't know if coilpacks or ignition amps have failed.

I have personally seen a failed ignition amp and also duff sparkplugs cause poor running.

The ME7 ECU in the 4 motion and other 4 pot turbos often picks a cylinder but not always.

Substitution of the ignition amp is the quickest way to check it out. They may fail after a short time of running but be ok first thing in the morning.

Gavin

[RedMk2Gti]

Ya, turn out the fault is ignition control module (aka ignition amp, power output stage, whatever confusing names )

Dame expensive little electronic box