4 volts to ground.why?

awp said:

i can take my meter and stick one probe in the ground and touch anything metal and read 4 volts.
if im sweaty there is a tingle.

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Put a 100w incand. lamp across the 4v and measure it again. If the voltage drops to 2v there is about 10 Ω (resistivity of the soil?) in series with this voltage.
With this load you may see different voltages depending on what metal you touch, with lower voltages being farther from the source, if there is a single source.

Using your body as an ammeter:
"Tingle" = ~4mA, give or take.
4v/4mA = 1k skin resistance; pretty low for a small contact area, but you have damp, salty, skin.
No tingle = <1 mA means > 4kΩ.

See table 1 in this link.
http://www.easternvoltageresearch.com/datasheets/safety.pdf

awp said:

just the way it is?

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All kinds of currents at all kinds of frequencies are flowing in the ground, some of which kills livestock.
http://en.wikipedia.org/wiki/Single-wire_earth_return

Ground resistance testers have provisions for finding a quiet place on the freq. band to make their tests.
If you have a battery operated oscilloscope or spectrum analyzer you can look in on all this.

Soares has written a classic book on this subject.