Classic/Antique Car Repair: 1992 Cadillac STS, fuel delivery system, fuel pressure regulator

Question
I have a 1992 Cadillac STS..what occurs is it stalls out when im driving. It stalls on highway or regular streets, usually when I give it gas, I also noticied that the gas gage moves from side to side irreguarly sometimes not always. I have done a tune up, and replaced the fuel pressure regulator and ignition control module, i have also ruled out it being the fuel pump. Im assuming it has something to do with the fuel injectors but no codes are coming up..please help..it will be greatly appreciated

Answer
Hi Manuel:
Sounds like you have done all the correct things to fix the problem. You mentioned you tune her up. I am assuming as part of that tune up, you clean the fuel injectors. If not, they are most likely clogged.

However, if they was cleaned, and you are sure it is not the fuel pump, check the fuel filter and fuel lines. There is blockage somewhere in the fuel delivery system that's causing this problem.