Ok, so, my brother is a mechanic and told me about the tools to remove the clip connectors on the fuel filter, BUT, AutoZone sold me a USED FILTER! So I got everything else changed, the take off is sluggish. Cleared the codes and drove it for about 70 miles. Got the check engine light again, pulled the codes and still getting the p0171: System too lean bank 1. I don't know what bank 1 means, but I'm hoping it will be fixed with changing the fuel filter and NOT injectors. May also run a fuel injector cleaner through if I keep getting that code after I put the new filter in. Any other ideas?

95 Sportage w/welded and 5.89 geared dana 44's on 38.5" TSL's.- SADLY SOLD
CURRENTLY - 2000 sportage, 5.38 gears, welded diffs, 35" tires, 5.5" lift