- Thu Nov 24, 2022 5:32 pm
#59755
The animated image in the Hardware > Outputs > Coils section of the old Wiki is an example of Going Low, where the signal goes low (to zero volts or ground) to induce the coil to fire.
Priming Delay is intended to delay the injector prime if necessary to allow the fuel pump to bring the system to stable pressure. Neither clearing air nor delay for pressure should be required in most systems. Pre-start added fuel by priming is a different matter for tuning.
Rednaxs60 wrote: ↑Thu Nov 24, 2022 12:40 amChanged from GOING LOW to GOING HIGH. Did this because the testing I did with the OEM ECU had 12 VDC on three legs of the igniter wiring to ground. GOING LOW in TS had 12 VDC on none leg only.Something amiss with 3 legs having 12V. The test is to see if the driver grounds the coil when signal voltage (5V or 12V selectable) is applied, or when not applied. If the coil is grounded to pass current (dwell) when signal voltage is applied, it is a Going Low setup. If the coil is grounded when signal voltage is NOT applied, it is a Going High setup. The setting is what the signal does when the coil fires—going low or going high to fire the coil (not dwell it).
The animated image in the Hardware > Outputs > Coils section of the old Wiki is an example of Going Low, where the signal goes low (to zero volts or ground) to induce the coil to fire.
Rednaxs60 wrote: ↑Thu Nov 24, 2022 12:40 amHydro locked the engine while doing this. First time I had had this happen. Thought about it and there is a function/setting in the Speeduino manual under cranking settings called "Priming Pulsewidth" … There is no specific TS setting to match …Yes, the Priming Pulsewidth is what pulses the injectors before cranking. Turn that setting to all zeroes to prevent repeated priming flood. While it can clear bubbles, injector priming typically adds startup fuel and is tuned from zero during initial warm restart tuning, and further for cold starts. If only clearing air, the duration would be fixed.
Priming Delay is intended to delay the injector prime if necessary to allow the fuel pump to bring the system to stable pressure. Neither clearing air nor delay for pressure should be required in most systems. Pre-start added fuel by priming is a different matter for tuning.
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