With the help from others on a different web site, I'm almost convinced that I need a new injector pump. Have a good lift pump with 22 psi pressure. Recently (today) cracked the fuel lines going to injectors 1, 3, & 4 and got a little bit of fuel. The front line had quite a bit of bubbles. Also have a 1688 code stating that the injector pump controller manfunctioned. Only this evening did I replace the fuel filter. Do I need to bleed it? Does it take long for the fuel to flow properly after replacing the filter if I don't. And finally, what's your take on a used injector pump (money's tight right now and elk season's only a month away)? Thanks