fuel delivery

Hey hows it goin everybody. Ok lets get down to business. I have 96 Chevy Beretta with a 3.1 Sfi and 4spd auto. I've overhualed it at 109,000 miles and at 126,000 i was having a low idle problem. I figured plugs and wires so i changed those out.. Problems still Persisted so i dug a little further. Finds out i had a bad 1st and 3rd injector and a cracked fuel rail. After i replaced the fuel rail and injectors i was still having fuel problems. I took it in and my local mechanic told me my injectors were carrying a low voltage signal. :screwy: I then called a chevy dealer and asked for 2 replacement DELCO injectors. After being told the price for them 210.00 a piece.:eek: I researched a little further I was able to find 6 Accel injectors for a cool 195.00. The only thing is they all have different flow rates. 17lb/hr 19lb/hr 21lb/hr flow rating. My question to you all is this. What exactly is the stock flow rate of my 3.1 injectors. will the Accel injectors be a good substitution and will i have to tweak my cars ECM to accomodate my new injectors. and will my air/fuel mixture be out of whack as a result of the injectors. Any help would be great:rofl: if you have any information on this topic please feel free to reply to my thread thanks again for any help