255 Liter/Hr, In Tank Fuel Pump
For 1985-1992 GM Cars and Trucks
Catalog # 17933
INSTALLATION INSTRUCTIONS
• PLEASE study these instructions carefully before installing your new In-Tank Fuel Pump for 1985-1992 GM Cars and
Trucks. If you have any questions or problems, do not hesitate to contact our Technical Hotline at: 1-800-416-8628,
from 7am-5pm PST, Mon-Fri, or via e-mail at: Edelbrock@Edelbrock.com. Please fill out and mail your warranty card.
• Note: Proper installation is the responsibility of the customer. Improper or incomplete installation could result in poor
performance, related component damage, potential severe engine damage, vehicle fire, and will void your warranty. If you
do not feel comfortable installing these parts, we recommend having the installation performed by a professional mechanic.
• Description: This in-tank fuel pump replaces the factory pump and has an increased flow of 255 liters/hour (67 gph).
This in-tank upgrade pump is ideal for supporting performance improvements such as a big-bore throttle body, high
performance intake manifold, camshaft, supercharger, direct port nitrous system, etc. They replace your original pump
exactly and include all necessary hardware for an easy installation:
Kit Contents:
`Minimum Tools Required:
Qty.
K 1
K 1
K 1
K 1
K 1
K 1
K 2
Description
Fuel Pump
Fuel Pump Filter
Fuel Pump Adapter Grommet
Fuel Tank to Pump Bracket O-Ring
Electrical Connector
6” Section of Fuel Hose**
Hose Clamps**
1. Lift or appropriate jack
2. OSHA-approved jackstands
3. OSHA-approved fuel transfer pump
4. OSHA-approved fuel storage containers
5. Wire stripping and crimping tool
6. Various hand tools
**Not used in some vehicle applications.
INSTALLATION NOTES
• Remember: When working on your vehicle, especially when oil or fuel is present, always work in a well -
ventilated area. Keep all sparks, open flames, or other sources of ignition away from the work area. Failure
to do so could result in a fire or explosion causing vehicle or property damage, personal injury, and/or death.
• Before Beginning: This installation can be accomplished using common tools and procedures. However, you should have
a basic knowledge of automotive repair and modification and be familiar with and comfortable with working on your vehicle.
If you do not feel comfortable working on your vehicle, it is recommended to have the installation completed by a
professional mechanic. Using a factory service manual for your vehicle for reference is helpful.
• Note: Steps shown in these instructions are intended as a general guideline only. If you are not an experienced mechanic,
you should have a copy of your service manual on hand. The installation procedure for replacing your factory fuel pump is
covered in full detail in your factory service manual.
©2003 Edelbrock Corporation
Rev. 11/03
Catalog #17933
Brochure #63-0223
Page 1 of 4
accomplished safely by using the proper service tool as
specified in the factory service manual. Using the
proper tool is ideal. However, the locking ring can be
removed by other methods. Whichever method you
use, do not use any method that could potentially cause
sparks resulting in fire or explosion.
4. Inspect the bracket to ensure that the pump support has
not been bent during pump removal. The flat surface of
the support should be perpendicular (square) to the tube
it is welded to (See Fig. 4). If it is out of square, carefully
bend it back to square to allow the pump to fit properly.
Take care not to damage the support or the tube.
3. Once the locking ring is removed, carefully remove the
bracket from the fuel tank. Be careful not to bend the
float arm or scratch the float when it is removed.
Discard the old fuel tank to bracket o-ring seal.
90°
Return
Tube
PUMP REMOVAL AND REPLACEMENT
1. Note the position of the fuel pickup filter in relation to
the bracket before removing the filter. Remove the filter
by pulling on it while rotating it in one direction.
Discard the filter.
Fuel Pump
2. Note the polarity of the electrical connections at the
pump and remove the electrical connections. Write
down which wires are connected to the positive and
negative terminals and the respective color of each
wire’s insulation.
3. (Note: Your original pump will be mounted in one of
two ways. See Fig. 2 and 3. If it is mounted as shown
in Fig. 2, then follow step 3a for removal. If it is
mounted as shown in Fig. 3, follow step 3b for removal).
Support
Fig. 4
5. Install the supplied pump rubber adapter grommet onto
the inlet side of the pump. Test fit the pump on the
bracket and rotate the adapter grommet on the pump as
required to obtain the best pump outlet fitting to bracket
outlet tube alignment.
6. (Note: Your original pump will be mounted in one of two
ways. See Fig. 2 and 3. If it is mounted as shown in
Fig. 2, then follow step 6a for installation. If it is mounted
as shown in Fig. 3, follow step 6b for installation.)
Return Tube
Return Tube
Fuel Tube
Pulsator
Fuel Level
Sender
Hose
Fuel Tube
Clamps
6a. Using petroleum jelly, sparingly lubricate the fuel pump
outlet tube on the bracket and the pump outlet fitting.
With the supplied rubber hose and clamps, slip the
hose and one clamp over the the fuel outlet fitting on
the pump. Invert the sending unit and place the
remaining clamp over the fuel outlet tube. Install the
rubber hose and pump onto the fuel outlet tube on the
bracket. Guide the pump adapter grommet into the
pump support on the bracket. When the pump and
adapter grommet assembly are firmly seated in the
pump support, verify that the rubber hose is seated
against the fuel pump, and then position and tighten
the hose clamps.
Spacer
Fuel Level
Sender
Float
Fuel Pump
Fuel Pump
Float
Filter
Filter
Bottom
Of Tank
Bottom
Of Tank
Fig. 2
Fig. 3
3a. Remove the hose clamps, if so equipped, cut the
rubber hose, and remove the pump from the
bracket. Remove the cut hose piece from the
bracket tube and discard it, along with the used
hose clamps.
3b. Remove the pump by inverting the bracket. Pull
down on the fuel pump until the inlet end clears the
pump support and swing it to the side. Remove the
pump and pulsator from the bracket fuel outlet tube.
Save the pulsator and the pulsator to fuel pump
rubber spacer for use in mounting the new fuel
pump.
6b. Using petroleum jelly, sparingly lubricate the fuel pump
outlet tube on the bracket and the pump outlet fitting.
Install the rubber spacer and pulsator onto the fuel
pump. The spacer and pulsator are to be fully seated
against the pump when properly installed. Invert the
bracket assembly and install the pump and pulsator
assembly onto the fuel outlet tube on the bracket.
©2003 Edelbrock Corporation
Rev. 11/03
Catalog #17933
Brochure #63-0223
Page 3 of 4
Guide the pump adapter grommet into the pump
support on the bracket. Firmly seat the pump and
adapter grommet into the pump support. Then
verify that the pulsator and spacer are still fully
seated against the pump.
pads, insulators and brackets. Defective, missing or
mislocated pads and insulators will cause the
transmission of excessive noise into the vehicle.
2. Inspect and correct any defects in the fuel hoses, filler
neck connections, or similar components related to the
fuel system.
7. Install the supplied electrical connector to the pump
and to the factory fuel pump wiring harness plug.
8. Install the new fuel filter on the pump in the same
position or orientation as the original filter. To avoid
damage to the filter, place it on a clean, flat surface
and push the pump straight down into the filter cup
until it is fully seated on the pump(See Fig. 5). (Note:
Take care to properly align the filter the first time. If it
has to be removed, the filter will be contaminated or
destroyed by removing it, and a replacement filter will
be needed.)
3. Install the fuel tank in the vehicle and tighten the tanks
support strap bolts. Reconnect all lines and hoses and
tighten securely. Connect the electrical connections.
Make certain that all hoses, fittings, and electrical
connections are correctly and securely attached.
4. Be sure that all fuel lines are correctly routed and secured
in any mounting brackets. Make sure the wiring harness
is installed in the original position and secured in any
wire clips or brackets, if present.
WRAP UP
1. Using only equipment approved for use with gasoline,
refill the fuel tank with gasoline. (Note: Always clean
any gasoline spills immediately).
Fuel Pump
Adapter
2. Inspect the fuel system for leaks. Repair any leaks before
proceeding.
Pump Inlet
Bracket
Filter Cup
3. With the ignition switch off, install the fuel pump fuse,
and reconnect the negative (ground) cable to the battery.
4. Turn the ignition key to the “Run” position only. This will
charge the fuel system. You may need to do this a few
times to get pressure. Once you have pressure, check for
any leaks and repair. Then, start engine and re-check for
leaks. (Note: Turn off engine and correct any leaks
before continuing.).
5. Clear any trouble codes in the electronic control unit
(ECU) that may exist as a result of the fuel pump
replacement procedure. Use the factory service manual
for assistance, if necessary.
Filter
Flat Surface
Fig. 5
BRACKET INSTALLATION
1. Inspect the fuel tank for dirt and debris. If the amount
of dirt or debris is excessive, clean the fuel tank before
installing the bracket assembly.
2. Inspect the bracket to make sure it is clean and ready
for installation.
3. Place the supplied fuel tank o-ring seal in the groove
at the fuel tank opening. Place the bracket assembly
into the tank using care not to disturb the o-ring seal
or to hang the float assembly on any protrusions in the
tank. Also use care not to fold or twist the filter, as this
could cause restricted fuel flow. Install the locking ring
and rotate it clockwise until it is properly seated
against the stops. Check service manual for an
approved sealant for locking ring.
TROUBLESHOOTING
Should the fuel pump fail to operate:
1. Check the fuel pump fuse and fuel pump relay as outlined
in the factory service manual.
2. If the pump has power and proper polarity, check the
remainder of the fuel system as outlined in the service
manual.
(Note: This pump will not remedy any malfunctions in
the fuel pressure regulator, fuel injectors, or other fuel
system problems).
FUEL TANK INSTALLATION
1. Inspect the condition and location of all tank mounting
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Technical Toll-Free Hotline: (800) 416-8628 • Office: (310) 781-2222
E-Mail: Edelbrock@Edelbrock.com
©2003 Edelbrock Corporation
Rev. 11/03
Catalog #17933
Brochure #63-0223
Page 4 of 4
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