I apply the gas it jerks or going u hill jerking i replace master sensor, fuel filter, and spark plug and wires

Test fuel pressure if below spec.get new pump

Check the vacuum modulator on the transmission for a cracked leaky vacuum hose.

I will put my bets on a bad spark plug wire

could b fule filter get it diagnostics

If the jerking happens under load (accelerating on the highway, going up a hill), it could be your fuel pump, but more likely your fuel FILTER.
If the jerking happens at higher RPM, it is more likely a misfire from a bad spark plug wire, fouled spark plug, or bad coil pack,
If you notice a smell of raw fuel when the vehicle is idling, make sure that your air filter is clean.
If the "Check Engine" light is on, have a local auto parts store connect an ODB sensor to determine what code is being generated.

Check the EGR Valve, if the problem is only
load related -- meaning mostly under high vacuum
load & up hills

When you said it feels like its not getting enough gas, you may be right.
Since you have replaced the fuel filter, and you are not getting a check engine light, my suggestion would be to check fuel pressure with a gauge. The fuel pump may be weak.

likely fuel pump, dirty MAF sesnor or distributor CMP sensor going. go here

http://groups.yahoo.com/group/villagerquest/

You may try a new air filter and perhaps have your intake cleaned. Now is it "jerking" on you? Perhaps at a stop light when the brake is applied. You may want to address the spark plug wires and plugs.

May be time to do a good maintenance service on it, Spark plugs, wires, fuel and air filters. More load being placed on the engine on an up hill pull, so this should fix it for you.