I have a 4.3 and 5 speed 4x4, the engine will miss under load, new gas tank and sending unit installed, looking at replacing fuel filter, any other ideas?

1. Clogged fuel filter; or
2. Bad fuel pressure regulator; or
3. Clogged fuel pickup strainer in gas tank ("fuel sock"); or
4. Water or other contaminant in fuel (replace all fuel with new).

There are several issues that can cause this. (1) Fuel Pump which is located on the sending unit in the case tank. (2) debris in the gas tank causing causing the debris to wrap around the boot or the sock (3) clogged catalytic converter (4) misfire of a plug or simply a bad plug (4) speed sensor (TCM) (5) bad air filter

Fuel Pump Assembly from a wreck ($60) plus install or new about $350 installed, cleaning of the gas tank ($90) or new gas tank $300 installed or used gas tank from wrecker ($125), plugs ($90 plus install), TCM speed sensor $250 installed (dealer only) and bad air filter ($20 easy install)

could be the float in the tank might have a hole in it and is stuck

Fuel Filter Removal & Installation To Remove:

1. Remove fuel tank.
2. Remove fuel pump/fuel gauge sending unit.
3. Remove fuel filter from fuel pump/fuel gauge sending unit.

To Install:

1. Install fuel filter to fuel pump/fuel gauge sending unit.
2. Install fuel pump/fuel gauge sending unit.
3. Install fuel tank.

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However, I would look at ignition or tune up issues rather than simply a fuel filter.

Find out what the engine problem is by having the engine's computer scanned through the OBD-II port.

1992-96 Models

Be sure this procedure is done in a well ventilated area.

1. Disconnect the negative battery cable.
2. Relieve the fuel pressure.
3. Remove the rear seat cushion.
4. Remove the floor service hole cover.
5. Disconnect the electrical fuel pump wiring at the fuel pump assembly. Check for any fuel leakage while in there.

Fig. 6: Pull back the rug under the rear seat to access the fuel pump and sending unit cover

1. Remove the gas cap, this will prevent any fuel gas spilling out of any high pressure lines.
2. Using SST 09631-22020 or an equivalent line (flare nut) wrench, disconnect the outlet

pipe from the pump bracket.

1. Remove the pump bracket attaching screws.
2. Disconnect the return hoses from the pump bracket, then pull out the pump/bracket assembly.
3. Remove the nut and spring washer, then disconnect the wires from the pump bracket.
4. Remove the sending unit attaching screws, then remove the unit from the bracket.
5. Pull the lower side of the fuel pump from the bracket.
6. Unplug the connector to the fuel pump.
7. Disconnect the hose from the pump.
8. Separate the filter from the pump. Use a small screwdriver to remove the attaching clip.
9. Inspect all of the lines, hoses and fittings for any sign of corrosion, wear or damage to the surfaces. Check the pump outlet hose and the filter for restrictions.
10. When reassembling, ALWAYS replace the sealing gaskets with new ones. Also replace any rubber parts showing any sign of deterioration.

To install:

1. Install the pump filter using a new clip. Install the rubber cushion under the filter.
2. Connect the outlet hose to the pump, then attach the pump to the bracket and tighten to 22-25 ft. lbs. (29-34 Nm).
3. Engage the connector to the fuel pump.
4. Install the fuel sending unit to the pump bracket.
5. Install the fuel pump and bracket assembly onto the tank. Use new gaskets. Tighten the pump bracket retaining screws to 34 inch lbs. (4 Nm).
6. Connect the return hoses to the pump bracket.
7. Install the service hole cover, then the engage the fuel pump and sending unit connector.
8. Install the rear seat cushion.
9. Start the engine and check carefully for any sign of leakage around the tank and lines. Road test the vehicle for proper operation.

Hope this help (remember comment and rated this).

must take gas tank off is on the complete fuel pump sending unit

Fuel pump is located inside the fuel tank and is attached to the sending unit. Do not smoke or have any open flame in the work area when removing the fuel pump.

REMOVAL OF FUEL PUMP:

1. Disconnect the negative battery cable.
2. Relieve fuel pressure
3. Remove the rear seat cushion.
4. Remove the floor service hole cover .
5. Disconnect the electrical fuel pump wiring at the fuel pump assembly. Check for any fuel leakage while in there.
6. Remove the gas cap, this will prevent any fuel gas spilling out of any high pressure lines.
7. Use a fare nut wrench to disconnect the outlet.
8. Remove the pump bracket attaching screws
9. Disconnect the return house from the pump brackets, then pull ou the pump/bracket assembly.
10. Remove the nut and spring washing, then disconnect the wires from teh pump bracket.
11. Remove the sending unit attaching screws then remove the unit from the bracket.
12. Pull the lower side of the fuel pump from the bracket.
13. Unplug the connector to the fuel pump
14. Disconnect the hose from the pump.
15. Separate the filter from the pump. Use a small screwdriver to remove the attaching clip.
16. Inspect all the lines, houses and fittings for any sign of corrosion, wear and damage to the surfaces. Check the pump outlet hole and the filter for restrictions
17. When reassembling, ALWAYS replace the sealing gasket with a new ones. "Also replace any rubber parts showing any sign of deterioration".

To install:

1. Install the pump filter using a new clip. Install the rubber cushion under the filter
2. Connect the outlet hose to the pump and pump bracket.
3. Engage the connector to the fuel pump. Install the fuel sending unit to the pump bracket. The remainder of the installation is the reverse of the removal.
4. Start the engine and check carefully for any sign of leakage around the tank and lines. Road test the vehicle for proper operation.

The fuel pump is in the gas tank, the best way to do this is to get some friends and remove the bed from the frame. There is i believe 8 bolts that hold the bed to the frame, and don't forget to remove the hardware to the gas tank filler neck. Once the bed is off the frame, you can get to the fuel tank. Disconnect the wire harness and might as well replace the harness since there only $12.00 last i looked, disconnect the fuel line and return line. Remove the fuel pump retainer ring and lift up on the fuel pump sending unit. To install replace the rubber O ring and oil it before installing the new fuel pump sending unit. Install the fuel sending unit retaining ring, gas lines, new wire harness, and filler tube. Good lime also to check the hose to the EVAP since you can inspect them, look for any dry rot to the vacuum lines and replace if needed. Reinstall the bed and use lock tight to the bed bolts or replace them with stainless bolts. Good luck and hope this helps, oh and you might as well change the fuel filter while your have the bed off. The other way is to drop the gas tank which means draining the tank and raising the truck. 

try taking the air cleaner assembly off you might not be getting enough air to engine
if this is the case then the throttle body needs to be maintenanced

heres another suggestion it just hasnt sucked gas to the engine to crank over sometimes they help

go out buy an electric fuel pump
find the fuel inlet source to engine hook up electric fuel pump
attach only ground to something in engine compartment
then get a can so that when gas comes out it has something to go into
tap the electric fuel pump power lead to the positive of battery let run till gas comes out make sure not to spark your working with gas
once gas becomes present detach electric fuel pump all the way set aside
hook gas line back to port and then start vehicle this should start

also with fuel filters there are 3 on a vehicle
one in engine compartment
one on chassis back by the tank
and one in the tank called the sending unit this has a filter in the tank this one could be clogged
make sure these filters are in the right position with gas flow flowing in right direction