f250 06 6L loses oil pressure

[Terryhan05]

I started my truck (2006 F250 6L 120,000 miles) the other morning to go get a Christmas tree. The temp was in the low 40’s. Started normal. After 4 or 5 min to worm up we pulled out of the driveway. About a mile down the road 35mph oil gage droped to 0 then came back up to normal. Did this a few times then stayed at 0. I pulled over oil was level full had someone pick me up and take me to get new oil filter. Came back about an hour later. I installed new filter started up and pressuer was fine. On way back home same thing all over again. Does anyone have any ideals on what to check?

[Terryhan05]

Well new development. I was changing the oil sending switch. To see if that was the problem. When I unscrewed it it striped out the threads. So Is there an easy fix for this or do I need to take the oil filter housing off and replace the base?

[dledford1991]

Well the problem is probably the pressure switch. The truck actually had oil pressure even though the gauge was reading 0psi. If the truck had no oil pressure it would not run due to the injectors being fired by high pressure oil. The only option you would have as far as the oil pressure switch would be to helicoil the hole.