I have just bought a 1991 Caprice 9C1 and I have a few questions. The engine idles smoothe but once it is put into gear, the engine stalls and hesitates. Someone suggested having the fuel injectors replaced as well as the fuel filter. I have not been able to locate an owner/repair manual and do not know where the fuel filter is located. Can someone tell me where the fuel filter is and if the fuel injectors are easy to replace. The injectors do not spray in a mist but instead spray in a heavy stream. Any help is appreciated.