Oil Pressure?

[AngryLepercon]

So leaving work today I started my truck to let it warm up and noticed a awful knock in the motor. Got in it and noticed my check gauge light was on and it was my oil pressure gauge was reading zero then it jumped back to normal and it did this randomly and a lot. I take it to the shop that I always do and they told me its probably the sending unit well they looked and thats not it. Said its probably the pickup unit in the bottom of the motor and its doing damage to the motor. Any other possibilities to fix this or that would cause this without taking the bottom of the motor apart. Thanks for any help. And its a 99 XLT 4.0l 4x4 if that helps.

 

[feellnfroggy]

Yeah pour seafoam in your oil, no more than 500 miles lates do an oil change. Maybe even less. Its cold, o the oil is gettin going slower. But prolly needws cleaned, even if not it will eliminate or verify the pickup problem.