Ok. But where is the stamp on the pump? I still have pictures I can look. If I cannot find it might take it down againIf you are handy at changing things, take off HP fuel pump #2. Check date stamp, it will look like 211207 that means 21.12.2007, if its not newer than the car just change it out.
This will be the cheapest if you don't wont to go down the test equipment route. Will be interested to know, make sure you reply back.