i don't think you can set these, but heres a fix
big solenoid (that can handle 75 amps), a botton to activate. and a finger with precision timing. easy, simple..
i plan on doing this as a addon with my current glowplug circuit, with a switch auto, off, on
or you can replace it. theres two type of glowplug circuits, slow (6 sec.) fast (3 Sec). don't forget pre (before you sit) and post (after a driving block)..