Why are S F I fuel lines 2 meter body leaking?

which engine?
The V6 , it has a real name.
there were 3 v6s used.
what displacement?
sounds like the 3.1L GM V6, not the isuzu 3.2. (2 kinds too)
The GM is the LG6 engine, GM name.
the last carb car , in USA was ISUZU, in 1994.
and before that some very odd , electric carbs. (avoid those)
in 1991
there were 4 engine (1 I4 and 3 V6)
ONLY the 2.3L 4 banger was carb , 2 barrel;
the 3.1L is and was, TFI , so is NOT A CARB.
This TFI has a Real ECU, (EFI system)
and the injector does have seals and can leak.
buy a seal kit and put it in,.
TFI means throttle body injected, x2 in this case
the book shows how to do this, (at mitchells) log in, and read?










the steps. are clear.
he engine is equipped with 2 fuel injectors; both are located in the throttle body.

1. Relieve the fuel pressure. (ask)
2. Disconnect the negative battery cable.
3. Remove the air cleaner.
4. At the injector electrical connectors, squeeze the 2 tabs together and pull them straight upward.
5. Remove the fuel meter cover and leave the cover gasket in place.
6. Using a small prybar, carefully pry the injectors upward until they are free of the throttle body.
7. Remove the small O-ring from the nozzle end of the injector. Carefully rotate the injector's fuel filter back-and-forth to remove it from the base of the injector.
8. Discard the fuel meter cover gasket.
9. Remove the large O-ring and back-up washer from the top of the counterbore of the fuel meter body injector cavity.

Most likely yes, only one way to find out is to try.

you need to replace the lines. the inner core must be split and leaking out on the outer core. cut the lines about 3 inch and use a line pipe repair kit. and fix. sometimes there is a bit extra on the lines so you can cut 10 or 20mm off the line and fit it to the tank line.

Some of these intakes have a channel under the throttle body that supplies flow to the EGR. The channel is below the mounting plate for the air horn. Also clear the computer of old Codes.

Code 171 and 174 mean lean condition. It means more air is getting into fuel mix than is metered through air intake. Try using water spray bottle on all seams and Vacuum lines while engine runs and opening will draw in water and affect RPM.

Use water spray on Brake booster while engine runs. Bad diaphragm will leak Vacuum.

Finally, rear metal tube to DPFE has 2 short Vacuum lines which DPFE fits on. The metal tube goes to Exhaust. Some have a metal ridge on this tube. The ridge can leak Exhaust flow and affect the DPFE readings. Sometimes rust can build in this tube and it may need to be cleaned to restore flow.

What is 3.4.

check for fuel leaks. from the gas tank, to the fuel lines, to the carb. i assume its an electronic throttle body 2 barrel. i have seen those leak internaly from the inside of the carb/throttle body causing exsess fuel to be used. you could also have a very bad fuel/air ratio going on there. could be bad o2 sensors. but i would start with the leaking fuel first.

The plenum shouldn't be damp with gas. Is it a throttle body fuel injection system?

Could be a leaky injector.

Fuel Meter Body & Fuel Injectors (4.3L Engine) Removal & Installation 1995-2002 Models (RPO L35) To Remove:
4.3L (RPO L35) Fuel meter body assembly

1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
2. Remove or disconnect the following:
   • Upper intake manifold (See: Upper Intake Manifold)
   • Fuel meter body
   • Injector retainer lock nuts (J) and retainer (K)
   NOTE: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals. The fuel injector is serviced as a complete assembly only. Also since the injectors are electrical compartments, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur. Fuel injector cleaning is not recommended.
   
3. While pulling the poppet nozzle tube downward, push with a small tip punch down between the injector terminals until the injector is removed

To Install:
4.3L (RPO L35) Fuel meter body assembly

Note: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.

1. Lubricate the new injector O-ring seals with clean engine oil.
2. Install or connect the following:
   • Fuel injector (L) into the fuel meter body injector socket
   • Retainer (K) and injector retainer lock nuts (J) and tighten the nuts
     1. Torque to: 27 inch lbs. (3 Nm)
   • Fuel meter body
   • Upper intake manifold (See: Upper Intake Manifold)
3. Test drive the vehicle to confirm the repairs.

1993-2005 Models (RPO LU3) To Remove:
4.3L (RPO LU3) Fuel meter body assembly

1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section.
2. Remove or disconnect the following:
   • Upper intake manifold (See: Upper Intake Manifold)
   • Fuel meter body
   • Injector retainer lock nuts (J) and retainer (K)
   NOTE: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals. The fuel injector is serviced as a complete assembly only. Also since the injectors are electrical compartments, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur. Fuel injector cleaning is not recommended.
   
3. While pulling the fuel injector downward, push with a small tip punch down between the injector terminals until the injector is removed

To Install:
Note: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.

1. Lubricate the NEW injector O-ring seals with clean engine oil
2. Install or connect the following:
   • Fuel injector (L) into the fuel meter body injector socket
   • Retainer (K) and the injector retainer lock nuts (J) and tighten the nuts
     1. Torque to: 27 inch lbs. (3 Nm)
   • Fuel meter body
   • Upper intake manifold (See: Upper Intake Manifold)
3. Test drive the vehicle to confirm the repairs

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions Section.
2. Relieve the fuel system pressure. Refer to the fuel system relief procedure in this section.
3. Remove engine cover.
4. Disconnect negative battery cable.
5. Remove upper manifold assembly.
6. Disconnect fuel meter body electrical connection and the fuel feed and return hoses from the engine fuel pipes.
7. Remove poppet nozzle out of the casting socket by squeezing the nozzle locking tabs together.
8. Remove fuel meter body by releasing the locktabs.
   NOTE Each injector is calibrated. When replacing the fuel injectors, be sure to replace it with the correct injector.
   
9. Remove lower hold-down plate and nuts.
10. While pulling the poppet nozzle tube downward, push with a small prytool down between the injector terminals and remove the injectors.
    
    Fig. Exploded view of the fuel meter assembly, including the injectors
    

To install:

1. Lubricate the new injector O-ring seats with engine oil.
2. Install o-rings on the injector.
3. Install fuel injector into the fuel meter body injector socket.
4. Install lower hold-down plate and nuts. Torque the nuts to 27 inch lbs. (3 Nm).
5. Install fuel meter body assembly into the intake manifold. Torque the fuel meter bracket retainer bolts to 88 inch. lbs. (10 Nm).
   CAUTION To reduce the risk of fire or injury ensure that the poppet nozzles are properly seated and locked in their casting sockets.
   
6. Install fuel meter body into the bracket and lock all the tabs in place.
7. Install poppet nozzles into the casting sockets.
8. Engage electrical connections.
9. Install new o-ring seals on the fuel return and feed hoses.
10. Connect fuel feed and return hoses and tighten the fuel pipe nuts to 22 ft. lbs. (30 Nm).
11. Connect negative battery cable.
12. Turn the ignition ON for 2 seconds and then turn it OFF for 10 seconds. Again turn the ignition ON and check for leaks.
13. Install the engine cover.

are you talking about the
Vortec Fuel Injector Spider or CSFI System

or just the in tank fuel pump and senders assembly 0 ring

its a worry that problem
wiring and fuel in the same place

could ask an auto electrician for the bits you need to fix this

if you go to a wrecker cut off the wires and connectors you need from a wreck to fix


all silicons are short terms fixes
and dissolve in fuel eventually

send me some money and maybe i'll tell you