If he had the timing out by much you would have bent valves!
Fords reccomendation is 100K or 10 years, however it is good practice to change it before this!
The ECU does not adapt to a cam belt change!
Won't be power steering switch, that being a pressure switch, this tells the ECU to increase the engine speed when the PAS applies a load, you have a permanent issue.
You are on the right track however, i.e. cleaning the ISCV, the other thing I would check is the vacuum hoses, these can split which causes these issues as well, they are located on the front under the inlet manifold.
Martin