mck1117 wrote: ↑
Mon Jan 03, 2022 7:22 am
It could still be peak-hold. That just means it has no boost phase. The injector driver goes boost (high voltage) -> peak (low voltage, higher current setting) -> hold (low voltage, lower current setting). The pump could still do the latter two phases while skipping the first one.
True, but if + is permanently tied to 12V, and - looks like the yellow line here: https://rusefi.com/forum/viewtopic.php?p=38300#p38300
then that says to me it isn't peak/hold.
Eyeballing the trigger, this looks like 775 RPM - 155ms for two cycles yields 1/(155/2. / 1000. / 60.)
The solenoid is on for around 6ms - that's 28 degrees (360/(155/2.) * 6)
So we're in the ballpark.
Andrey - I think you could just connect the - of the solenoid to the MC33816 board. It holds the negative pin to ground during the entire pulse. The mosfet on the GDI board has an Rdson of 25mohm, while the TLE8888 (is that what you're using) is 350mohm.
Are you sure the HPFP solenoid is 2.2ohm? I know the injectors were around 2.2, seems odd the solenoid would be that low too if it's driven in saturated mode.