When I bought the car the bloke said it had a super chip
Now that i've had a new turbo fitted it's juddering a little would this mean i new HT leads or spark plugs or does it need remapping.
If I was to come to you could you tell me what sort of chip or ECU it is.

 

The juddering could be a failing spark caused by faulty coil packs or too big sparkplug gap, could be a multitude of more teminal reasons too.

What turbo before and after?
If you have a boost gauge (if you don't you should!) what is the boost profile like?
What year and model of car?

 

Boosting to 15psi can't rember what turbo i think TDO5
1995 Classic

 

What was the turbo before the change ? Is the boost held or does it fluctuate.

Happy to take a quick look at some point next week but best to ring first as I've got a few remaps to do which means I'll be out on the road quite often.