Why is my Honda fuel pump not working?
A very common and well-known problem with 90s Hondas is a failure of the main relay. The main relay sends power to the fuel pump and other systems on most Hondas of this vintage. If the main relay fails, it often causes a no-fuel-pressure condition, which leads to a no-start.
What to do if your fuel pump relay is short?
If you detect zero ohms or any resistance value instead of infinity, your fuel pump relay has shorted power pins and needs to be replaced. Set your digital multimeter to ‘continuity’. Connect one lead to one of the power circuit pins, and connect the other lead to the other power terminal.
Where is the main relay on a Honda?
So if you have a Honda or Acura that is not starting DUE TO LOSS OF FUEL PRESSURE this is a good place to start. You may be able to repair the main relay normally found under the dash on the drivers side. If this helps great remember me fondly and pass my name along because I just saved you at the very least about $80, at the most $200.
Where is the fuel pump in a car?
The fuel pump is located in the fuel tank, near the rear of the vehicle and can usually be heard when the engine starts. A healthy fuel pump plus a healthy fuel pump relay will often produce a variation of a low volume hum or whine which can be heard from inside the vehicle, or from the outside, near the fuel tank.
Where is the fuel pump relay on a Honda Accord?
Verify that the problem doesn’t stem from the fuel pump, ignition or any other source. Disconnect the battery and find the main relay. Typically, the main relay on a Honda Accord rests behind the dashboard to the right or left of the steering while with accessibility up under the dashboard or behind the steering column access or dash panel.
When did the Honda Accord main relay start?
In Honda Accords manufactured between 1986 and 1997, the main relay serves as the “middle man” helping other devices to control the ignition and fuel system. If your Accord won’t start, then you may have a damaged or broken main relay.
A very common and well-known problem with 90s Hondas is a failure of the main relay. The main relay sends power to the fuel pump and other systems on most Hondas of this vintage. If the main relay fails, it often causes a no-fuel-pressure condition, which leads to a no-start.
What to do if your Honda Accord won’t start?
If your Accord won’t start, then you may have a damaged or broken main relay. Verify that the problem doesn’t stem from the fuel pump, ignition or any other source. Disconnect the battery and find the main relay.
What happens when a fuel pump relay goes bad?
If the fuel pump relay has an issue while the vehicle is operating it will cut off power to the fuel pump, which will cause the engine to stall. A faulty relay may allow the vehicle to be restarted a short while later, while a completely failed relay will not. 2. Engine does not start
Where do you find the fuel pump relay?
When you shut off the ignition, it powers down the fuel pump. In most vehicles, the fuel pump relay can often be found in the fuse box in the engine bay, which is usually a long black box which contains fuel pump relay along with various other fuses and relays.
What happens when a Honda main relay fails?
If the main relay fails, it often causes a no-fuel-pressure condition, which leads to a no-start. I’m posting this in all caps because you need to burn this into your brain.
When does a fuel pump relay go bad?
If you’re lucky and your car restarts after a short while, your fuel pump relay is faulty, which requires immediate inspection. The fuel relay may be the culprit if the car suddenly seems to lose power while driving, or slowing down with no apparent reason.
How to set up a fuel pump relay?
1 Set your digital multimeter to the lowest range on the Ohms scale or set it to ‘continuity’. 2 Connect one lead to one of the power circuit pins, and connect the other lead to the other power terminal. 3 Your meter should read infinite resistance.
If the main relay fails, it often causes a no-fuel-pressure condition, which leads to a no-start. I’m posting this in all caps because you need to burn this into your brain.
Where are the fuses on a Honda Accord?
Fuse box diagram (fuse layout), location, and assignment of fuses and relays Honda Accord Mk4 (CB7/CB9) DX, LX, EX & EX-R (1989, 1990, 1991, 1992, 1993). Fuses and circuit breakers protect your vehicle’s electrical system from overloading.
What does the main relay on a Honda do?
The main relay in a vehicle controls the fuel pump and supplies power to the injectors. Knowing how to test a Honda main relay can help you better pinpoint the cause when an electrical issue arises. There’s a pretty simple way to tell if your main relay is affected. Simply turn on the vehicle and see if it continues to run.
Where is the battery negative terminal on Honda main relay?
Consult your owner’s manual or vehicle repair manual and remove the main relay. Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay.
Is there no power to the fuel pump?
No power to the fuel pump and the fuel relay is not getti… Q: No power to the fuel pump and the fuel relay is not getting power. My car has 190000 miles.
Why is the fuel pump and relay not working?
The ignition circuit, which includes the ignition switch, controls power to many components, including the fuel pump and relay. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
No power to the fuel pump and the fuel relay is not getti… Q: No power to the fuel pump and the fuel relay is not getting power. My car has 190000 miles.
Where is the fuse box on a Honda Civic?
For the Honda Civic fifth generation 1991, 1992, 1993, 1994, 1995 model year. Fuse box located. Engine bay. fuse box diagram. Fuse box №2 (under hood).
Why does my Honda Civic engine not start?
It’s only when the PGM-FI main relay fails completely that your 1.6L Honda Civic’s engine will not start. When the PGM-FI Main Relay fails intermittently, the engine will not start or suddenly turns off every now and then (but most of the time it starts and runs without any problems).
Where is the relay on a Honda Civic?
Trouble shooting the fuel pump starts with the relay. It’s located under the dash in the driver’s footwell on the left hand side. Disconnect the main relay connector and jump the Black/Yellow #5 wire to the Yellow/Green #7 wire. The fuel pump should come on and whirr like it normally does.
It’s located under the dash in the driver’s footwell on the left hand side. Disconnect the main relay connector and jump the Black/Yellow #5 wire to the Yellow/Green #7 wire. The fuel pump should come on and whirr like it normally does. If this doesn’t happen, either the relay or the fuel pump are dead.
Trouble shooting the fuel pump starts with the relay. It’s located under the dash in the driver’s footwell on the left hand side. Disconnect the main relay connector and jump the Black/Yellow #5 wire to the Yellow/Green #7 wire. The fuel pump should come on and whirr like it normally does.
How can I tell if my Honda Civic fuel pump is bad?
Testing your Civic’s fuel pressure on each side of the pump would be the best way to diagnose this problem. A priming fuel pump sounds like a high-pitched whine for a few seconds and can be heard with a sharp engine right after the ignition key is turned, but before the starter is engaged.
It’s only when the PGM-FI main relay fails completely that your 1.6L Honda Civic’s engine will not start. When the PGM-FI Main Relay fails intermittently, the engine will not start or suddenly turns off every now and then (but most of the time it starts and runs without any problems).
What to do if your fuel pump won’t turn on?
Disconnect the main relay connector and jump the Black/Yellow #5 wire to the Yellow/Green #7 wire. The fuel pump should come on and whirr like it normally does. If this doesn’t happen, either the relay or the fuel pump are dead. It this does happen, there might be another issue keeping the fuel pump from activating.
How can I tell if my fuel pump relay is faulty?
2. Engine does not start. Another symptom of a faulty fuel pump relay is an engine that does not start. If the fuel pump relay fails the fuel pump will be left without power. The engine may still crank when the key is turned, however it will not be able to start due to lack of fuel.
How does a fuel pump relay control the fuel pump?
The fuel pump relay is usually controlled by the ignition or Powertrain Control Module, and when switched on, will provide current to the fuel pump so that it may function. As the fuel pump relay controls power to the fuel pump, any faults with it can cause issues with the fuel pump,…
What to do if your fuel pump relay stops working?
Connect one lead to one of the power circuit pins, and connect the other lead to the other power terminal. If you hear a beeping sound, your fuel pump relay’s power pins have shorted. Replace the relay. You can test the fuel pump relay, along with many other parts in your car, with the cheap and handy multimeter. (Photo Source: carcody)
What are the symptoms of a bad fuel pump?
The engine may still crank when the key is turned, however it will not be able to start due to lack of fuel. This symptom can also be caused by a wide variety of other issues, so having the vehicle properly diagnosed is highly recommended. 3. No noise from the fuel pump
Can a bad fuel pump cause a bad relay?
If when hot the fuel pump doesn’t come on, first check that the relay clicks, if not you may have a bad relay. You can check by testing voltage at the 2p connector on the top of the fuel pump when you first turn the key: brown wire (+), green (-). If you have voltage, then there is a problem with the pump and it may need to be replaced.
Where is the fuel pump relay located on a car?
The fuel pump relay is an electronic component that is found on virtually all vehicles equipped with an internal combustion engine. It is often found in the fuse box located in the engine bay and functions as the primary electronic switch that controls power to the fuel pump. The fuel pump relay is usually controlled by…
Can a Honda engine shut off the main relay?
If so, the main relay is okay. Should the engine shut off, the main relay could be impacted. If you suspect you have a bad main relay in your Honda, you should perform the following test to be sure. It can save you time, money, and aggravation, as most parts suppliers don’t take returns on electrical components.
If when hot the fuel pump doesn’t come on, first check that the relay clicks, if not you may have a bad relay. You can check by testing voltage at the 2p connector on the top of the fuel pump when you first turn the key: brown wire (+), green (-). If you have voltage, then there is a problem with the pump and it may need to be replaced.
What to do if your fuel pump doesn’t come on?
Take the seat off and listen. If when hot the fuel pump doesn’t come on, first check that the relay clicks, if not you may have a bad relay. You can check by testing voltage at the 2p connector on the top of the fuel pump when you first turn the key: brown wire (+), green (-).
Where are the relays on a Honda ATV?
There are 2 relays behind the battery down in the electrical bay, when you turn the key, you should first hear the pump hum for a sec or two then you will hear a buzzing from the IACV which is on the throttle body, and finally there should be a click from the fuel pump relay if everything is normal. Take the seat off and listen.
Where is the fuel pump on a Honda corolla?
On my 2000 corolla if you took off the back seat there was a big rubber plug and if you pulled it off you can see the whole fuel pump/sending assembly and be able to get to it that way without taking the tank out of the car. Maybe your car is like that as well.