Onyx LS1

iTrader: (5)

This can't be good. So I got on the 427 pretty good the other day and shortly after my oil pressure dropped. It would fall to 0 and come back up if I blipped the throttle. I started it up today and the pressure stayed up until it got heated up then it fell a little. It would stay up until I blipped the throttle, then it would fall to zero and would come back up when I blipped it again. My oil pressure has always been slightly lower since I installed a ported pump. I am going to change the oil tonight and see what I see. MTI recommended that I try a Melling high volume pump. I only have ~5k miles on the motor so I hope the bearings aren't worn out. Does anyone have any other ideas about what my issue could be??
THANKS!
-Justin

kossuth

iTrader: (12)

First off don't run it obviously. We had an old tractor do some BS like that. Turned out it was the pickup tube. Could be a tore or worn o-ring in your case. Or maybe it is cracked or something like that. Doubtful it is the pump unless it is a total POS. Like I said sounds like a pickup tube issue to me.

Onyx LS1

iTrader: (5)

Yeah that sounds like a possiblility. I'm about to start tearing things apart, I guess that is the best I can hope for.
Any other ideas?

PREDATOR-Z

I would first check the oil guage sensor, those things break rather easily.
Then Pump/pick up assembly
Also rear oil plug
Otherwise, could be something internal related to bearings