Hello

I have a BMW 318it -98 with Vialle lpi system. It runns perfect on gasoline when I disable the lpg system by taking the fuses off and reset the ecu. If do not reset it the same thing continious on gasoline. There is also power lost when lpg ecu working

On the lpg the cold start looks like this: 

http://youtu.be/2cfJ5wlVeEc

Sometimes it dies on the first time. When the engine is warm enough, it runns perfect on gas.

I have changed spark plugs (Bosch irdium), lambda sonde (Bosch) and new viallle injectors.

Also checked all engine vacum hoses, 

The closest point where I can do diagnostics to vialle system is about 1000km :)

Do you have any idea what to check next?

Greatings from Estonia,

Timo

Gemeten

fuel pressure - ok (3,5bar) engine compression - ok

Foutcodes

no codes