heres a link that to my original post of "stall at start up" maybe this can lead you in the right direction
http://www.toyota-supra.info/forums/...-start-up.html
heres a link to supramania were someone else is experiencing low oil pressure. (tips on using a checker)
http://www.supramania.com/forums/showthread.php?117672-low-oil-pressure
oh and I read a very technical explanation of exactly how our stock pressure gauge works, if you interested I can see if i can dig it up again. just if your curious, think it was on supramania also.