u/Mysteeri5

Fuel pump gets 5v voltage seems to be on the lowside.

Injector voltage can't be measured (i don't have a osilliscope).

Injector opens with a 9v battery.

I get a strong spark on the spark plug and it has enough compression.

I have tried to test all wires between ecu and the injector but they seem ok.

When starting and using a different battery to power the fuel pump i get around 3 bars of pressure on the main fuel line. But still the injector does not open.

A new harness costs around 300€ in Finland and a new ecu costs around 500€ + programming.

What could the problem be?