Strange setup problems

[Ilkka]

Originally Posted by Richard L

One more measurement tomorrow. Voltage difference between P60 and J67 in pre-crank position. It is possible the fuel pump is dragging down the voltage at J67, so that the voltage is more 0.5V below P60. Under this condition, the system will trgger un-unintended.

That's easy because voltage at J67 in pre-crank is 0V, as discovered a few posts back.

I don't understand how J67 has anything to do with this? Injector+ (and also main power) is connected to the pin60, and injector- to the pin3.

Also fuel pump starts only for a 2-3 seconds at pre-crank position and doesn't start again until the engine is started. The HFS-3 is still in yellow light mode during this.