1985 190E 2.3 won't start
 

There is plenty of fuel going to the distrubution block, tested fuel pressure and I'm getting 80psi. Car will run ifI pour fuel into air plenum. I removed line from top of block to injector and no fuel.I have fuel at the return line and also line from block to pressure regulator. Is problem is Dist. block? Can this be serviced or cleaned out? Any help would be greatly apprecitated.
Norm