kangarooin (Juddering)

[Spanish S2]

Been a run in the S today and surprised with the problem it has got, runs fine and then judders and then runs fine again, it has done it when coasting but is worse under acceleration, don´t know if this has anything to do with it but it had its Spanish mot the other week and the emissions were higher than normal.

[v8s4me]

It could be anything I'm afraid but start with the electrics. Check the HT leads and connections to the distributor and then work through the rest.

[NeilS3]

Sounds like the throttle pot.

[GreenV8S]

Mild shunting can be caused by anything throwing the engine slightly out of tune. It can be aggravated by worn transmission and/or bushes.

[Classic Chim]

I once had a marvellous S2 2.9
I had a similar juddering issue arise and after going though most things eventually changed stepper motor and juddering stopped.

[NeilS3]

Yep, throttle pot / stepper motor very common.
Cheap fix.

[Classic Chim]

Very true

[Spanish S2]

Hi all, after checking various components coil, plugs,leads, distributor etc I removed and cleaned the ISCV ( Stepper motor )
and for the last couple of weeks the car has drove O K thanks for feedback hope thats solved the problem.

[v8s4me]

Thanks for the up date. It's good when people come back with a result.