Pump bubble wont fill up with gas.

If the water pump is moving the coolant,then you may have a bad head gasket allowing combustion gas into the cooling system.Fill the cooling system right to the top and without the cap on watch for a constant flow of bubbles coming to the top.Bubbles?=bad head gasket or a crack.

If the bulb wont prime you have a leak some where lines, tank, cap, if it is not air tight it will not pump.tank full of gas.

You may have introduced air bubbles into your fuel lines. Try cranking while flooring the accelerator all the down. This will sometimes help move the air bubble through.

Did you remove all air from the tubing from the gas tank to the fuel pump? Read more on the net about air bubbles in the fuel line.

Is gas getting to the carb? Try blowing air back into fuel tank and listen for bubbles. Also check on cogged fuel filter.Rubber in fuel pump?

fuel filter is out and it will need a new gas pump

if your engine is TD27 turbo, replace you fuel fillter and replace with new one. fill up with your new fuel filter with your gas before installation. tighten if firmly, make sure no air/gas leak. then pump it manually. stop pumping until you fell that fuel line has no air inside or hard to pump/press.

Hello,

Please make sure you have no leaks on the carburetor, if it has not been turned om for a long time, prime the engine for cold start. Here is how to do this.

Clug exhaust pipe while you crank it up.
Pump the bubble filled with gas closed to the carburator.

Thanks,

Do not push nozzle all the way in. Pull it out about two inches.

Try checking the vent tube. if you look under the truck it will go from the gas tank filler tube to the top of the gas tank.