oil pressure

back to my first entry got the sending unit out finely, but after it gets warmed up, put it in gear the oil pressure drops way down, so that the low oil light comes on. oil is full. I got a bad idea that oil pump is bad the engine 4.2 has 103,000 on it but its not used very much. bought it last year used with 98,000 on it.????????

This is not a funny thing, I had to live with it, my van gas very low oil pressure at idle and when I accelerate it goes up a bit, the main bearing are going slowly :screwy: the engine has 318,00KM but I'm still taking care of it and wait that day it will seize up :icon16: and then I will put in a long block, that,s life, I pour in a Lucas oil stabilizer and it help abit, it doesn't making noise for now, cross my finger....