1985 Dodge Ram 50 Sport - white smoke

what color smoke --white is burning coolant---black is fuel --blue is oil ----have scanned for any trouble codes ----as to grinding metal even if holding those 3 fluids if its not pumping them you'll have something fail need to search the noise problem

What color smoke? Black is emissions related, blue/black your burning oil and white your burning anti-freeze. With the "skip" your REF to, you probably have a bad spark plug, wire, or bad cylinder and burning some oil or coolant. CK plugs , wires & do a compression test. Pressure test Radiator for head gasket leak.

P1509 Dodge - Leak Detection Pump Switch or Mechanical Fault

P1298 Dodge - Air/Fuel Ratio Lean Under Wide Open Throttle Condition
- Plugged air filter
- Plugged fuel filter
- Defective fuel pump
- Ignition system weak-misfires
- Defective coil

P0118 Dodge - Engine Coolant Temperature Sensor Circuit High
- Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

P0113 Dodge - Intake Air Temperature Sensor 1 Circuit High
- Faulty Intake Air Temperature (IAT) sensor
- Dirty air filter
- Intake Air Temperature (IAT) sensor harness is open or shorted
- Intake Air Temperature (IAT) sensor circuit poor electrical connection

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Smoke diagnostic is made by colour.
If u mean pistons head gasket,yes,it can smoke.
White (clear) water vapor.Ceck coolant level.Ceck engine oil colour by dipstick.

Black:runs rech on fuel (fuel filter/fuel lines/fuel mixture...)
Blue (whity):worn pistons rings.

Chears.
Tips:
Whity smoke before warming may be natural on cilli mornings with lot of compressure the engines just blows vapors.
Old oil/fuel residues in the exhaust tubing may blow smoke after heating the engine ,must track problem (...).
Black smoke on hitting the acceleration to the floor may be natural (overcharged) avoid sport driving style.

Is the exhaust converter older than 12 years?
That's all they last & then block the exhaust flow out
EGR Valve ?

oil too low!!!!!!!!!!!!!!!!!!!!!!!!!!! have some change your oil & filter immediately !!! drain radiator & coolant reservoir , refill w/ fresh 50/50 coolant , white smoke is not exactly a good thing ! it could mean coolant is mixing w/ oil , because of a possible leak from a bad gasket either from intake manifold or head gasket !!! water pump would not cause this ! I would bet on a gasket leak given the age of the car . 2000 ! 13 years old, how was it maintained, intake gaskets are cheaply made, head gaskets are made well ! so, my bet, goes to the intake manifold gasket !!!!!!good luck kristle !

i would say fuel pump. i had a 1996 do the same.

Check for leaking valve stem oil seals.

The first thing to do is to start monitoring the coolant level.
This will rule out the possible of headgasket coolant passage pin hole leak.
Headgasket can go at 170,000 miles+ Less if your truck is doing a lot of hauling.
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Have you try Amsoil diesel treatment?
It work well for me.
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I will ran the tank below 1/4 and fill up on NON bio-diesel blend.
Use Chevon diesel until you get the problem figure out.
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Water can come in three way
air condensation in the morning
coolant
fuel.

Have you tested your TP sensor ?