Question1986 1200 Honda Goldwing Aspencade. My bike has been turning of for quite a while now. I first replaced the fuel filter and cleaned the fuel tank and it worked for a while. Then it started again and I did the same thing again. It worked for a shorter time and I thought it was the tank again, cleaned it again, it worked for a shorter time again. I started hearing the fuel pump make a funny sound...pinging of some sort or something like that...now it will run for about 5 miles and I have to stop and disconnect the fuel line from the fuel tank and it will start again. The pump will get very hot to touch. I ordered a fuel pump from Honda but they told me it would take 4 to 8 weeks to get to me. I talked to a yamaha dealer and he told me that I could get an aftermarket pump at a parts store. I bought a fuel pump but am afraid to use it. The pump is 2-3.5 psi, 12 volt and Gal/Hr=28. My question is can I use this pump for a while until I get the original one or is there another way to go. Thanks for any help you can give me.
AnswerHi Eric,
Refer to this website for the following info and more on same: www.intouchmail.net/~fmattox/limited/overview.html
If you need additional assistance, advise me and I'll reply. Use my email for better service. mshively1@woh.rr.com
Respectfully,
Mark Shively
GL1200 Ltd. and SEI Repair -- Fuel Pump
Operation/Capacity Inspection
INITIALLY, WHEN THE KEY IS TURNED ON, AND THE "KILL" SWITCH IS MADE, THE FUEL PUMP WILL RUN FOR ABOUT FOUR SECONDS TO PRESSURIZE THE SYSTEM.
THE FUEL PUMP WILL NOT WORK WITHOUT RELAY #4 AND RELAY #5 IN THE ACTIVE MODE. RELAY #4 FEEDS THE SOURCE VOLTAGE FOR RELAY #5 AND THE SOURCE VOLTAGE FOR THE COIL OF THIS RELAY. RELAY #5 ACTIVATES WHEN THE ECU COMPLETES THE CIRCUIT BY PROVIDING THE GROUND SIGNAL TO THE COIL OF RELAY #5. ONCE RELAY #5 IS PULLED IN, THE 12 VOLTS FOR THE FUEL PUMP IS PROVIDED FROM THE OUTPUT CONTACT OF RELAY #5, BACK THROUGH THE WIRING HARNESS TO THE CONNECTOR ON THE BACK FENDER. GROUND FOR THE FUEL PUMP IS ALSO IN THIS CONNECTOR, AND IS CHASSIS GROUND.
Checking the Fuel Pump
The Fuel Pump is located on the right side of the engine, down towards the bottom.
The 12 Volt Connector for the Fuel Pump is located on the rear fender.
Find the Fuel Pump connector, and disconnect it.
Apply 12 volts (+ & -) from the battery, to the side of the connector that leads to the fuel pump.
THE FUEL PUMP SHOULD RUN. IF IT DOES NOT, THEN REPLACE THE FUEL PUMP, IT IS DEFECTIVE.
IF THE FUEL PUMP DOES WORK AFTER THIS TEST, THEN YOU NEED TO CHECK THE CIRCUITY THAT OPERATES RELAY #5. IF RELAY #5 WORKS, THEN YOU HAVE A BAD WIRE, OR A BAD CONNECTION FROM THE FUEL PUMP RELAY, OR A FUSE THAT NEEDS REPLACING. CHECK THE WIRING AND CONNECTIONS FROM RELAY #5 BACK TO THE FUEL PUMP AND CORRECT THE PROBLEM AS NECESSARY.
Checking Fuel Pump Capacity.
You should have an operating Fuel Pump by this time, so now you need to check Fuel Pump Capacity.
From the Fuel Pump, fuel flows across to the other side of the engine. There it passes through the FUEL FILTER, and then from the Fuel Filter to the Fuel Injection Manifold. It flows through the manifold, crossing over to the other side of the engine through the pipe at the front of the engine, and then through the right side manifold to the FUEL PRESSURE REGULATOR. From the Fuel Pressure Regulator, it passes back to the Fuel Tank. In other words, it uses a Constant Velocity Loop System. The pressure regulator maintains the fuel pressure in the manifold to 35-40 psi.
THE SYSTEM SHOULD BE CONSIDERED TO BE PRESSURIZED AT ALL TIMES. WHEN LOOSENING ANY FUEL FITTING, TAKE PRECAUTIONS AGAINST GASOLINE FALLING ON A "HOT" EXAUST SYSTEM.
Follow the fuel hose from the top of the filter over to the engine side. There is another "Banjo" fitting there. Loosen this fitting with a rag in your hand, and wipe off the gasoline that leaks out of it. Then remove the fitting. CAREFULLY pull the hose end out to the side of the motorcycle and place the end of it in a large can. (Capacity of at least 1/2 gallon.)
USE ONE OF THESE LISTED METHODS TO CHECK CAPACITY
IF YOU DO NOT HAVE THE TOP POD AND SEAT REMOVED. OR IF YOU DO HAVE THEM REMOVED, AND THE FUEL PUMP DOES RUN FOR 3-4 SECONDS WHEN YOU FIRST TURN ON THE KEY.
Place the motorcycle on the CENTER STAND. RECONNECT THE FUEL PUMP CONNECTOR ON THE REAR FENDER. ENGAGE 1ST GEAR. TURN ON THE KEY AND MAKE THE KILL SWITCH.
APPLY 12 VOLTS (+ & -) TO THE FUEL PUMP CONNECTOR ON THE SIDE THAT LEADS BACK TO THE FUEL PUMP.
In either case, press the starter button, or apply 12 volts to the connector till you have a measured 22 ounces of fuel in the can.
THE FUEL PUMP SHOULD TAKE ONE MINUTE OR LESS TO DO THIS.
IF IT DOES NOT, REPEAT THIS TEST USING THE BANJO FITTING AT THE BOTTOM OF THE FUEL FILTER. IF YOU THEN HAVE THE REQUIRED CAPACITY FROM THE BOTTOM FITTING, THEN REPLACE THE FUEL FILTER AS IT IS CLOGGED.
IF IT STILL DOES NOT HAVE THE REQUIRED CAPACITY, THEN YOU WILL NEED TO CHECK THE FUEL PICKUP IN THE TANK, THE FUEL VALVE, AND THE FUEL LINE BETWEN THE TANK AND THE FUEL PUMP FOR BLOCKAGE.
IF THERE IS NO BLOCKAGE, THEN YOU WILL HAVE TO REPLACE THE FUEL PUMP AFTER FIRST CHECKING IT FOR BLOCKAGE, OR ANY MATTER THAT COULD ALTER FUEL FLOW.
Reassemble the fuel system after making this checks, using new sealing washers at the banjo fittings.
Checking for Fuel Pressure
THE SYSTEM IS PRESSURIZED, TAKE PRECAUTIONS AGAINST FUEL DROPPING DOWN ONTO THE HOT EXAUST SYSTEM.
The check port on the fuel manifold, is only a small bolt. Since I couln't find the correct fitting to use in order to hook the fuel pressure guage to it, I used a tapered rubber fitting on the end of the hose that was attached to the gauge for the rest of these tests. When I pressed the starter button, I had some gasoline spray out alongside the tapered fitting that ran down onto the exaust system. Make sure that your exaust system is "COLD" before you run these tests.
On the RIGHT Fuel Manifold, about halfway toward the front of the engine, there is a fuel pressure check port. Remove the bolt and sealing washer, and using a rag, wipe off any gasoline that leaks from the system.
Attach the fuel pressure gauge, and while pressing the starter button check the pressure gauge. The system should maintain pressure in the 35-40 PSI range.
If it does not maintain this pressure, REPLACE the FUEL PRESSURE REGULATOR, IT IS DEFECTIVE.
