Oil Pressure Fluctuation

[TxFiddler]

Well, I searched and couldn't find the same problem so here goes.  I noticed today that my oil pressure is going up and down.  1980 c10 2wd with 350.  When I'm at a stop with the truck in gear, the pressure drops close to zero.  I put it in neutral and the pressure comes back up to just under the half-way mark.  When driving the pressure is just under the half-way mark also.  The guage is stock.  I'm not sure of the age of the sending unit or oil pump.  Any suggestions?

[Irish_Alley]

I heard so dont qupte me on this but a bad pump can cause this if its about to fail

[TxFiddler]

I heard so dont qupte me on this but a bad pump can cause this if its about to fail

Well then it probably wouldn't be a bad idea to go ahead and get one.  Thanks!

[Blazin]

I would check the sending unit, and gage first. Allot less work!

[TxFiddler]

Blazin, thanks for the advice.  Since there aint no noise and the engine aint runnin hot, prolly not much to worry about. Right?  I need a day or so to get a new sending unit. (the bell shaped by the distributor, right?) 

[Blazin]

Yes.

[heavychevy91]

had the same problem with my truck. turned out to be a bad sending unit just as blazin said

[Irish_Alley]

yeah yeah yeah whatever lol  ::)no go with what they said i don't know why but that should of been the first thing that i said.

[heavychevy91]

hey who knows i guess i was just hoping it wasnt a bad pump 

[TxFiddler]

Replaced the sending unit today and seems to have fixed the problem.  Oil guage reads around 12-15 at idle and 30+ when driving at highway speed.  Thanks for all the advice.  Now, what will be next?

[topp]

Now, what will be next?

Guage will go from all the electrons that are correctly flowing thru it...

[bobcooter]

Replaced the sending unit today and seems to have fixed the problem.  Oil guage reads around 12-15 at idle and 30+ when driving at highway speed.  Thanks for all the advice.  Now, what will be next?

With my old rig I never ask what will be next.