My 1985 300td wagon will not idle. I cleaned all the lines, fuel filters, and even installed new injectors. I checked all the vacuum lines to the best of my ability. It is not starting as easily as it used to, takes some cranking. I turn the idle screw up so that it runs at high rpms so that I can crack the lines to see it fuel is getting to the cylinders. Everything seems to work fine, untill I start turning down the idle screw; then it stalls. I''ve tried ''everything'' but can''t seem to get it to start and idle as normal. Did a 'Fuel Point of Delivery' check as described in the Hayes Manual, but NO fuel came through. It spits out when I crank it, though. Help.