Re: Alfa 156 2.0 ts cutting out - rpm sensor already changed
check the battery connections for loose clamps .... i had a 1.8 TS that would cut out at various revs & i blame dthe TDC sensor or bad wiring loom issues, in the long run it turne dout that the + termical 'looked' tight but in fact could be removed by a simple twist ... after looking closer at it, while the nut was full [ obverly tightened by the previous owner ] the termimals was misshaped. So a few suttle adjustments & a new nut its clamps 100% good now.
so chekc the baiscs even if they look right they may not be.
NOTE the + lead is held onto the battery by a 10mm nut + bolt ... also there are 2 + heades screws so make sur eto open the 2 + screws to determine if the lead is fully tight.