Hello I have a kind of weird problem here. The car will start fine and idle fine when cold but once warmed up if I turn it off it will restart but will not hold the idle unless I hold the pedal down for a few minutes until something kicks in and then the RPMs raise up nice and smoothly, I let my foot off the pedal and it will hold the idle and drive fine. I have installed new distributor coil wires plugs Etc TPS adjusted properly timing has been verified compression checked put the smoke machine on it no leaks new map sensor, vacuum steady at 18. when warm it will not start and hold an idle unless I hold the pedal down and something kicks in then it Smooths out idles fine let my foot off the pedal it would drive fine hold idle at stop lights and everything, slight hiccup here and there but never close to cutting off until I turn it off and then it starts all over again. struggling to try and figure out what that is that's kicking in and making it smooth out