How To Test a Honda Accord Fuel Injector

Whether you are diagnosing a misfire or having problems starting your Honda Accord, it can be handy to know how to test a Honda Accord Fuel Injector. Leaking fuel injectors can increase emissions, decrease fuel efficiency as well as make it hard for the car to start in the morning. OBDII DTC trouble codes on engine misfire can also be hard to track down if you don’t know how to eliminate your fuel injectors as a possible cause.

Today I’ll be showing you how to test a Honda Accord fuel injector on a 2000 Honda Accord with the F23 engine in it. We’ll be using a multimeter to test the operation of the injector, if you need a guide on checking for leaking injectors, check here.

This vehicle carries a VIN ID of 3 for the fuel injectors in question, and we’ll be testing the injector to see if it’s still good while still in the engine. The Honda Accord fuel injector part number is 06164-P8A-000 or 06164-P8A-A00 but you can also use the Acura part number of 06164-PGK-A01.

Of course you can substitute the stock fuel injector in your 2.3 liter VTEC Honda Accord with a standard Denso one as well. While our How To DIY Guide on how to test a Honda Accord fuel injector is on a 2000 model, this test is the same for any F23 engine.

Symptoms of a bad Accord fuel injector

• Random F23 engine misfire
• Lack of power from SOHC
• Poor gas mileage

Before you begin our guide on how to test a Honda Accord fuel injector, you will want to start your car and warm it up but not to operating temperature. Because we’ll be measuring the resistance in the fuel injector, we need it within a certain temperature range. If you start your Accord and the fans turn on, let it cool for half an hour or so before testing.

If you’ve got a scan tool handy, connect and check the engine temperature to ensure it’s within the 100º F range. Once your Honda Accord is warmed up, disconnect the battery all together to prevent any accidents from occurring. Before you can access your fuel injector terminals with your multimeter, it’s easier to test with the PCV and wiring moved out of the way.

Locate and remove your PCV plug that’s mounted to the valve cover of your 2.3 liter F23 Honda Accord.

Now’s a good time to check the plastic valve here for signs of wear or hardening. Heat and time can kill this PCV valve, and the part number for this Honda Accord PCV valve is Honda 17130-PR4-Y01. It can also be found under the Acura badge as part number 17130-PR7-A01.

Unplug your air intake temperature sensor, idle air controller, throttle position sensor and MAP sensor, because this harness is all connected to your fuel injector clips.

Unplug your fuel injector clips, and then you can depress the plastic retaining clips that hold the big cumbersome wiring harness in the way. Lift up and swing towards the driver side of your Honda Accord. Make sure you do not damage or tear the plastic hoses that connect the rubber vacuum lines to the fuel pressure regulator. Now that this is out of the way, you can reach your fuel injectors easily to test them.

Now take your multimeter out and switch into Ohms Ω mode, and you’ll be testing the fuel injectors one by one to see which one is bad. The colors on your leads won’t matter for this test, simply put them to the fuel injector clip spades to see what the resistances is. You now know how to test a Honda Accord fuel injector, so begin with cylinder #1.

Write down each finding of resistance on a piece of paper and label the readings by cylinder. You are looking for a resistance between 5 and 7 ohms. If you find that one or more of your injectors have gone bad, you’ll need to replace your fuel injectors.

How To Replace a bad Honda Accord fuel injector

Because you’ve already got most of the wiring harness and electrical connectors out of the way, figuring out how to replace a bad Honda accord fuel injector isn’t so bad.

Begin by disconnecting the fuel pressure regulator vacuum hose, and the fuel pressure return hose. This line will be under pressure and you should always wear proper eye equipment and take the proper measures for safety because fuel and fuel vapors will be present.

This will release all the pressure left in your fuel rail, making it a much easier job for you to remove the rail and injectors. Now that the rail has been depressurized, undo the fuel pressure damper on the F23 fuel rail. This will look like a big round nut with a plastic shield over it, unscrew this to remove.

The fuel feed line in your Honda Accord is a banjo style bolt. Remove the fuel damper and slide off the fuel feed line. Do not lose the washers or forget in which order they are installed back onto the fuel rail.

Now all that’s left is to remove the three 10mm bolts that hold the fuel rail in place and lift to remove. Now you have removed your Honda Accord fuel rail and injectors, replace the bad one using all new o-rings and grommets. The Honda Accord fuel injector o-ring part number from Honda is 16074-ZY3-000, and can cut over to the following Honda interchange part numbers:

1. 16472-P0H-A01
2. 16473-P10-A01
3. 16474-PT2-000
4. 9030107001
5. 91301-PLC-000

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