It maybe worth checking the fuel hose that connects to the injector rail. You can tell if it's leaking by looking at the plastic injector rail to see if petrol is sitting there, probably best to check when the car has been standing after a run. Normally tightening the jubilee clip should sort it.
Best to check the other fuel lines just in case as the rubber hoses do perish with age.
Hope this helps
cheers
Biz