I picked me up a 89 TTA and the guy I got it from said it has aftermarket injectors but did not know what size they are. There are some numbers on the injectors just wondering if anyone might know what size they are. On one side of the injector is a 621031 on the other is D3181AA, Also what should the Fule pressure be set at on these cars? It's got a adjustable fuel pressure regulator on it, Just wondering what they were set at from the factory. Thanks, Jason