M.B. DOC

I desparately need your help.

My car cranks but won't start either cold or hot. Once I add few ounces of fuel in air intake, it starts & runs on load till I shut down. I ran it more than 45 minutes. But, once I switched off, it won't restart.

I have replaced fuel accumulator. My both fuels are running. MAS relay & OVP are okay.

My initial thoughts are: fuel filter, pumps & ignition system are working.

Question: What else should be checked which can cause restarting problem?