my baby broke down few wks ago,just stopped,and when trying to start it, had black smoke coming from exhaust.got auto elec out,it showed up lamda ,sensor,replaced that and was ok for a week.broke down again,similar symptons,replaced water temp sensor yesterday,and it still won't start.had new dizzy cap and rotor arm done 6 wks ago.on a tight budget at the mo so cant keep spending loads,do any of you have any ideas at all?its got a week spark and its got fuel.