I have been informed, by a mechanic, that my fuel injectors need to be replaced. Due to replacement cost and the value of the vehicle, I would prefer to do the maintenance myself. Where can find a good source to provide instructions on how to install fuel injectors on a 1996 Chevy S10 pickup with a 4 cylinder engine?
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1996 Chevrolet S10
Question: Fuel Injectors replacement
Answer #1tamaples from Tom's Auto Clinic, December 22, 2010, 07:54Technician
Removing the fuel injectors is very simple. Simply unplug the electrical connector to each injector. Remove fuel lines to injector rail that holds injectors. Remove bolts and pull rail and all injectors together. I haven't seen a lot of injector problems on your particular engine, you may want to get a second opinion before you spend the money
ReplyPig Johnson, December 22, 2010, 08:25Rookie
Thanks for the info. Is it difficult to access the fuel injectors? What other components may require removal to access? The symptoms (smell of fuel, rough engine, & visible fluid residue near the head cover) indicate the mechanic may be correct. Thanks again.
mastertech6371 December 22, 2010, 08:29Master
a bit involved for a novice, just be carefull.
Fuel Return Line Retaining Bracket
Fuel Return Line Retaining Bracket
Injector Electrical Connectors
WARNING: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury. After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. in order to reduce the chance of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel in an approved container when the dIsconnection is complete .
Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure . See: Fuel Pressure Release\Service and Repair
Disconnect negative battery cable.
Remove the upper manifold assembly. Refer to Intake Manifold Removal .
Remove the fuel return line retaining bracket screw assemblies.
Remove the fuel return line retaining bracket.
Move the return line away from the regulator.
Remove the pressure regulator assembly. Refer to Fuel Pressure Regulator . See: Fuel Pressure Regulator\Service and Repair
CAUTION : In order to prevent damage to the fuel injector retaining bracket and fuel injectors, do not try to remove the fuel injectors by lifting up the fuel injector retaining bracket while the fuel injectors are still installed in the bracket slots. Do not attempt to remove the bracket without first removing the fuel pressure regulator.
Remove the injector retainer bracket attaching screws.
Carefully slide the bracket off in order to clear the injector slots and the regulator.
Remove the electrical injector connectors.
WARNING: In order to reduce the risk of fire and personal Injury, verify that the lower (small) O-ring of each Injector does not remain in the lower manifold. If the O-ring is not removed with the Injector the replacement Injector with new O-rings, will not seat properly in the Injector socket and could cause a fuel leak .
CAUTION : Cover the injector sockets in order to prevent dirt and other contaminants from entering the open fuel passages.
Remove the fuel injectors.
Discard the O-ring seals.
WARNING: In order to reduce the risk of fire and personal injury, verify that the lower (small) O-ring of each injector does not remain in the lower manifold. If the O-ring Is not removed with the injector the replacement injector with new O-rings, will not seat properly in the injector socket and could cause a fuel leak .
After lubricating the new injector O-ring seals with clean engine oil, install on the injector assembly.
Install the bottom teed Sequential injector assembly into lower manifold injector socket with electrical connectors facing inward.
Carefully install the bracket so that the injector retaining slots and the regulator are aligned with bracket slots.
Install the electrical injector connectors.
Install the pressure regulator assembly. Refer to Fuel Pressure Regulator . See: Fuel Pressure Regulator\Service and Repair
Install the injector retainer bracket attaching screws.
Tighten the injector retainer bracket attaching screws to 3.5 Nm (31 lb. in.) .
Install the upper manifold assembly. Refer to Intake Manifold .
Install the accelerator cable bracket with attaching bolts and nuts.
Tighten the accelerator cable bracket nut to 30 Nm (22 lb. ft.) .
Tighten the accelerator cable bracket bolts to 25 Nm (18 lb. ft.) .
Tighten the fuel filler cap.
Connect the negative battery terminal.
Turn the ignition switch to the ON position for 2 seconds.
Turn the ignition switch to the OFF position for 10 seconds.
Turn the ignition switch to the ON position.
Check for fuel leaks.
Install the air intake duct.
ReplyVisitor, March 24, 2011, 16:32
hey budy i did just that and ive got 2 thats leaking ive done it twice now on them 2 and still leaking
Answer #3Visitor, January 18, 2011, 05:46
Dont replace them. Send them for clean and flow test for $16 a piece--like new with before and after leak/flow test documentation.
Naples FL - pay pal its too easy