So you got it to idle correct? If so then your half way to there. Many times on a diesel you need to just rebelled the injectors. Once it's running crack the injector line at the injector tell you get nice strong spurts. Also you may have an air leek at the filter you replaced. By moving around the 30 year old lines many times you can crack them and not know it just because there old. If the filter is one of them with a glass bowl you may have placed the gaskets in the wrong place. Swapped upper with the lower. Let us know how it goes.