Plenty of companies that will test the ECU on the net.
Usually around £45-55.
Though it starting and driving would lead me away from the ECU being suspect.
A good diagnostic specialist can run a "flight test" which is a scanner hooked up then the car driven and all aspects of the ECU control are recorded for later study.
EGR faults normally show up as uneven idle speed so again not my first choice of suspect.
This could be so many things that the flight mode test might narrow it down but without it your/we're just guessing.
So I'm saying either get the ECU tested or find a capable diagnostic technician.
Hard part for you is telling the difference from capable to some one with a scanner.
Best advice is check for a local Bosh diagnostic specialist.
They're usually well trained.
Posted on Saturday 1st of October 2016Don't understand this? Ask a question