my oil pressure is always low but when i press on the gas it goes up right away could it be my oil pump or the sensor ?

 

How low? At what Idle?

Ive always heard, the oil pressure should raise with the rpms. Mine Idles at 700 and holds about 45pds and revd its maxs out at 80, but its not a stock pump.

i have ran 5-7 pounds at idle and it would rise when I revd, but thats an older SBC 400.

 

ive never seen it go past half even when its warmed up when i first start it up it doesnt move untill i press on the gas and when its fully warmed up it is usually jus barley above the red line

 

Thats bad, if it doesnt move off the redline till you press the gas. I would change the oil/filter and see if that helps . Man if it didnt i wouldnt drive it till i found the prob.
When Its cold, pressure should be higher than warm. Cold start on mine is around 70-80pound,

 

Could be the oil pressure sender, or bad gage. Verify the pressure using a test gage.

 

Is it car sounds different then usual? You can also check safety fuses or does the sensor is pluged in (sometimes plug get loose).

 

do what pete says, make sure your gauge is working at least close to correct, these gauges are known to be off a tad. are you hearding lifter rattle? what wt of oil are you using?