Just bought a mint 1989 Saab 900S 16v which accelerates away very nicely up to about 2,800rpm-ish at which point it seems to go flat up to 4,000 rpm. Since I've not had a car with fuel injection before I'm slightly at a loss as to what it might be as there are no other problems - it starts well (hot and cold) and idles smoothly, just seems a little flat. If it's any use, it's fitted with Bosch LH 2.2 injection
Cheers, Jim