Change Fuel Distributor - big problem.

[seria]

Hi,
I posted exact thread at BenzWorld.org

1991 Mercedes SL500.
Fuel distributor and EHA leak. Change remanufactured Bosch fuel distributor and new EHA. No more fuel leak. At the same time change all air distribution hoses to fuel injector including seals. Start the engine, idle fine for a minute or so and engine start to run really rough. step on accelerator engine die. Again start the engine, engine starts immediately and run rough. Again step on accelerator, engine die.
Change Fuel distributor and EHA back to old unit (leaking units). Start engine, engine starts immediately and run rough. Step on accelerator, engine die immediately.
Installed back remanufactured Bosch fuel distributor and new EHA.
Change both fuel pumps, fuel filter and Fuel Hose/Line (Fuel Filter to Fuel Line). No luck.
Check all fuses, no problem.
Distributor cap and rotor, practically new (only use about 1000km).

Now where do I start looking.
Appreciate all pointers.
Thanks.