4.0L v6 oil pressure????

[spl_explorer21]

Well guy's got a question i have a 4.0L v6 93 explorer it's in if that matters. now my oil pressure been acting up kinda.....and i say kinda because welll here let me explain. If i drive my oil pressure stay's at just beginning of work normal and doesnt go anywhere either soon as i start it now this is about maybe 30-40 degress. Now when i came out of school today was nice as hell i mean not hot hot summer day but at least warm enough for not a coat. soon as i started my truck up now my oil pressure was where it was before right in center aka normal really. what you guy's think. also i have checked the oil its clean and up to par where needs to be. appericate the help guys. this one is thrown me a curve ball


Thing's i thought might be what you guy's think? thx for the help

*Oil pressure switch
*Oil pressure sensor
*Oil pump(last resort hope it's not this )