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Disconnect the cable to the battery's negative terminal with a socket wrench. Loosen the filler cap on the fuel tank to relieve the pressure in the fuel tank. Drain the fuel tank by siphoning the fuel into a gasoline container with a hose. Raise the rear of the vehicle with a jack and support it on jack stands. Release the clamps on the hoses for the filler neck and vent tube of the fuel tank. Support the fuel tank with jack stands and detach the support straps for the fuel tank. Lower the fuel tank slightly and disconnect the electrical connections and hose on the fuel tank. Remove the fuel tank from the vehicle.
Turn the retaining ring on the fuel sender assembly counterclockwise with tool . Remove the retaining ring. Lift the fuel sender assembly out of the fuel tank and pull the fuel pump into the attaching hose while holding the bottom support of the fuel pump in place. Discard the O-ring on the fuel tank.
Install the new fuel pump into the attaching hose of the fuel sender assembly. Use care to avoid bending the fuel strainer since this will restrict fuel flow. Place a new O-ring on the fuel tank and install the fuel sender assembly into the fuel tank.
Place the locking ring on the fuel sender assembly and turn it clockwise with tool until the ring locks into place.
Install the fuel tank by reversing step 1. Pressurize the fuel system by turning the ignition on for two seconds and turning it off for 10 seconds. Turn the ignition on and check the fuel lines for leaks.
Basicaly your fuel pump located inside of gas tank, you have to lift and secure the vehicle high enough to lose and drop the gas tank!! Before decided to do this make sure gas tank is near empty lift&secure the vehicle visual check around the gas tank make sure all fuel and evap lines are disconnected nothing hold the gas tank except holder brackets, use under jack and safely secure gas tank( do not use direct jack to gas tank use wooden piece to dont damage it) use right size socket and wrench lose braket holdet nuts and bolts safely drop the tank and place on safe work place (no smokes or sparks) locate to fuel pump and remove the locker pin and pull out fuel pump slowy your fuel pump should sale complete assembly so replace pump unit and be carefully complete wire connections (TIPS,,With new fuel pump make sure replace the sealing gasket with correct new one or you gonna have serivce engine light for small evap leak so make it right at first time!!)) reinstall eveything the way you removed it !! good luck and make sure you gonna have helper around to drop the tank<
A 99 is most likely fuel injected, so the fuel pump is inside the gas tank. The gasket for this is a large O-ring in the top center of the tank and is unlikely to leak. Thus your leak is most likely in the line, put it up on a lift at a muffler or oil change place and look underneath for the wet spot which stinks of gas, that will lead you to the leaking spot. Gas tanks themselves can leak due to corrosion, this can be where road debris collects on top, and if you have a skid plate under the tank corrosion can build up between the plate and the tank eventually eating a hole in the tank.
Yes ,,instructions are below, Use eye protection for this procedure Remove or Disconnect:
Relieve Fuel Pressure
Disconnect negative battery cable
Raise vehicle on hoist
Remove Fuel Tank
Remove Fuel Gage sending and pump assembly by turning cam lock ring counterclockwise.
Lift assembly from fuel tank and remove fuel pump from fuel gage sender unit.
Disconnect pump wires, hose clamps, and clamp around pump body
Pull pump assembly out of rubber connectors
Inspect fuel pump attaching hose for any signs of deterioration. Replace as
necessary.
Install or Connect:
Push fuel pump assembly into attaching hose
Connect pump wires, hose clamps at attaching hose and around pump body
Place Fuel tank sending unit and pump assembly into tank using new O-ring
Place cam lock over assembly and lock by turning clockwise
Install Fuel Tank
Start engine and check fuel pipe connector for visual leaks
Disconnect the harness connectors from the module.
Disconnect the fuel and emission hoses from the module.
NOTE: To avoid damaging the lock ring, it is recommended to use special tool GM # J-45722 or equivalent to remove the lock ring.
Using a spanner tool remove the fuel pump module lock ring.
Fuel pump module
Remove the fuel pump module and discard the O-ring seal.
WARNING Drain the fuel from the fuel pump module into a fuel container to avoid the risk of fire and personal injury. Do not store fuel in an open container. NOTE: The lock ring may be reused even if "DO NOT REUSE" is stamped on it if the lock ring is not warped or damaged.
Check the lock ring clearance on a flat surface using a feeler blade. If the lock ring is warped more than 0.016 in (0.41 mm), replace it.
To Install: WARNING Replace the fuel module O-ring when reinstalling the fuel module to reduce the risk of a fuel leak that may cause a fire and personal injury.
Install a new O-ring on the fuel tank.
Place the fuel module into the fuel tank.
Install the fuel module lock ring using a spanner tool.
Connect the fuel and vapor hoses to the module.
Connect the harness electrical connectors to the module.
Install the Fuel Tank.
Check for fuel leaks using the following procedure:
Step 1: Place the ignition in the ON position for 2 seconds
Step 2: Place the ignition in the OFF position for 10 seconds
Disconnect the harness connectors from the module.
Disconnect the fuel and emission hoses from the module.
NOTE: To avoid damaging the lock ring, it is recommended to use special tool GM # J-45722 or equivalent to remove the lock ring.
Using a spanner tool remove the fuel pump module lock ring.
Fuel pump module
Remove the fuel pump module and discard the O-ring seal.
WARNING Drain the fuel from the fuel pump module into a fuel container to avoid the risk of fire and personal injury. Do not store fuel in an open container. NOTE: The lock ring may be reused even if "DO NOT REUSE" is stamped on it if the lock ring is not warped or damaged.
Check the lock ring clearance on a flat surface using a feeler blade. If the lock ring is warped more than 0.016 in (0.41 mm), replace it.
To Install: WARNING Replace the fuel module O-ring when reinstalling the fuel module to reduce the risk of a fuel leak that may cause a fire and personal injury.
Install a new O-ring on the fuel tank.
Place the fuel module into the fuel tank.
Install the fuel module lock ring using a spanner tool.
Connect the fuel and vapor hoses to the module.
Connect the harness electrical connectors to the module.
Install the Fuel tank.
Check for fuel leaks using the following procedure:
Step 1: Place the ignition in the ON position for 2 seconds
Step 2: Place the ignition in the OFF position for 10 seconds
REMOVAL & INSTALLATION NOTE: To gain access to the fuel pump, it is necessary to remove the fuel tank.
Depressurize the fuel system and remove the fuel tank from the vehicle.
Remove any dirt that has accumulated around the fuel pump attaching flange, to prevent it from entering the tank during service.
Turn the fuel pump locking ring counterclockwise using a locking ring removal tool and remove the locking ring.
Remove the fuel pump and bracket assembly.
Remove the seal gasket and discard it.
To install:
Put a light coating of heavy grease on a new seal ring to hold it in place during assembly. Install it in fuel tank ring groove.
Fig. 1: Fuel pump and sending unit used on the Regular Cab Ranger pick-up
Fig. 2: Fuel pump and sending unit used on the Super Cab Ranger pick-up
Fig. 3: Fuel pump and sending unit used on the Explorer and Mountaineer
Insert the fuel pump assembly into the fuel tank, then secure it in place with the locking ring. Tighten the ring until secure.
Install the tank in the vehicle.
Install a minimum of 10 gallons of fuel and check for leaks.
Install a pressure gauge on the throttle body valve and turn the ignition ON for 3 seconds. Turn the key OFF, then repeat the key cycle five to ten times until the pressure gauge shows at least 30 psi. Reinspect for leaks at the fittings.
Remove the pressure gauge. Start the engine and check for fuel leaks.
No, the fuel tank must be dropped if there is no access door (which there usually isn't for safety reasons).
REMOVAL & INSTALLATION NOTE: To gain access to the fuel pump, it is necessary to remove the fuel tank.
Depressurize the fuel system and remove the fuel tank from the vehicle.
Remove any dirt that has accumulated around the fuel pump attaching flange, to prevent it from entering the tank during service.
Turn the fuel pump locking ring counterclockwise using a locking ring removal tool and remove the locking ring.
Remove the fuel pump and bracket assembly.
Remove the seal gasket and discard it.
To install:
Put a light coating of heavy grease on a new seal ring to hold it in place during assembly. Install it in fuel tank ring groove.
Fig. 1: Fuel pump and sending unit used on the Regular Cab Ranger pick-up
Fig. 2: Fuel pump and sending unit used on the Super Cab Ranger pick-up
Fig. 3: Fuel pump and sending unit used on the Explorer and Mountaineer
Insert the fuel pump assembly into the fuel tank, then secure it in place with the locking ring. Tighten the ring until secure.
Install the tank in the vehicle.
Install a minimum of 10 gallons of fuel and check for leaks.
Install a pressure gauge on the throttle body valve and turn the ignition ON for 3 seconds. Turn the key OFF, then repeat the key cycle five to ten times until the pressure gauge shows at least 30 psi. Reinspect for leaks at the fittings.
Remove the pressure gauge. Start the engine and check for fuel leaks.
drain all the fuel you can from the tank, SAFELY using proper saftey equipment, place the vehicle on jack stands, disconnect the battery, place a jack under the tank, remove fuel cap, remove 3 screws holding filler neck to the inside of fuel filler door compartment, remove tank straps, remove driveshaft, lower tank slightly & remove fuel neck, wires, fuel couplings, lower tank & remove from vehicle. Carefully remove locking ring from the tank where it holds down the fuel pump asy, remove pump asy & replace components as needed, reassemble, check for leaks, road test vehcile
To gain access to the fuel pump, it is necessary to remove the fuel tank.
Depressurize the fuel system and remove the fuel tank from the vehicle.
Remove any dirt that has accumulated around the fuel pump module
attaching flange, to prevent it from entering the tank during service.
Turn the fuel pump module locking ring counterclockwise using a
locking ring removal tool or a brass drift and remove the locking ring.
Remove the fuel pump module.
Remove the seal gasket and discard it.
To install:
Put a light coating of grease on a new seal ring to hold it in place during assembly. Install it in fuel tank ring groove.
Insert the fuel pump module into the fuel tank, then secure it in place with the locking ring. Tighten the ring until secure.
Install the tank in the vehicle.
Install a minimum of 10 gallons of fuel and check for leaks.
Install a pressure gauge on the throttle body valve and turn the ignition
ON
for 3 seconds. Turn the key
OFF
, then repeat the key cycle five to ten times until the pressure gauge shows at least 30 psi.
One of the hoses to the tank must be the source of the leak....drop the tank down again and look to see if you can tell wich hose it is coming from. You may have to dry off the fuel so you can see where fresh fuel is leaking from, try not to inhalt too much of it and do this outside. Also beware of any sources of ignition- no bonfires today, ok? Good luck
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