Edelbrock Automobile Parts 17933 User Manual

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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