Hello Punto Lovers

First time on the Forum and need a bit of help.

Got a Punto GT Turbo 1998 running lumpy and no boost to Turbo. Head gasket and Turbo have both been replaced, new spark plugs, checked all air hoses and pipes and still no success. Fuel filter and pump are new, fuel is going through. I'm changing the HT Leads tomorrow, not so sure it will make any difference.

Any ideas would be more than welcome!!!!