Can a HPOP leak cause extremely low LPO pressure?

yeah, ive seen it happen,

basically you need to verify that you have good oil in the sump, if you now know the oil is good, check oil pressure while cranking, if low try overfilling the crankcase by only a few quarts and re check, if this fixes it you have a cracked or damaged pick up tube, if still no change, remove the oil filter and have a buddy hold down the little button on the top of that black thing, and have someone crank the engine and watch that the filter housing fills up with oil,if it doesnt you need a new oil pump if it does fill up you can count on a hpop leak so big that the lpop cant supply the hpop with enough oil.


that should send you down the right path.

are you are basing your readings off of the gage? if so, try to avoid driving the truck till you can get a scanner hooked up and see whats going on

well im glad you solve the issue, i have only seen this problem arise twice, once was a bad hpo stainless line, it gushed pretty bad, and the other well, it leaked at where yours is, if you remove the hpop you will see little casting holes and international or who ever manufactured the pumps pressed small little bb's in there, stupid huh? anyways on one of my trucks the bb came shooting out, and was soon found once the the hpop was removed, sitting their in the galley of the motor.

nah, something like that would get stuck long before if floated to anything critical, is kind of a decent size, so you very well may find it a few oil changes down the road lol.

im glad you solved your issue, now have fun putting it all back together.