Whether you are modifying your Honda Civic or it’s just your daily driver, knowing how to test Honda Civic injectors can save you a lot of money. Problems with your Civic injectors can lead to cylinder misfire, check engine codes, uneven performance and gas mileage as well as potentially damage your engine.
Today we’ll be showing you how to test Honda Civic injectors in a 1998 Honda Civic EX with a D16Y8 in it. This vehicle has a host of issues from random misfire, OBDII trouble codes of P0300, and P0303 as well. We’ve already addressed several issues with this SOHC engine, and today we’ll be testing the injectors and showing you how to do it.
Learning how to test Honda Civic injectors is very easy and straightforward if you own a multimeter. Not sure on how to use one? Check out our handy guide with a few pointers to get you started.
If you own a Honda Civic or any SOHC version of the Civic, including but not limited to the Honda Civic: Civic del Sol, Civic LX, Civic DX, Civic EX, and HX from the years: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, this test applies.
If you have a misfire code such as OBDII P0300 for general or engine misfire without a specific cylinder, not to worry. Our how to test Honda Civic injectors can help you test all four injectors and find the culprit to your misfire.
This test is great if you are modifying your vehicle or even if you just want to make sure your Civic is in the best condition possible.
How to find the bad fuel injector
If your Civic engine is running rough or misfiring, there’s an easy way to figure out what cylinder is having an issue. Start your engine and carefully unplug one fuel injector at a time, starting with cylinder #1. Observe the change in the idle or how the engine behaves. If the behavior or idle does not dip or change, chances are that is the problem fuel injector, and you should start there.
Either way, you should take the time to measure all four Honda injectors to make sure they are in proper working order. If the internal resistance in any of your fuel injectors is not within factory specification, it’s time for a replacement before the condition worsens.
How to measure resistance in your Civic fuel injector
The first order of business is to disconnect all the fuel injector clips on your injectors. On most OBDII Civics, this is fairly simple to do. For OBDI vehicles, it will help to have a pick to help pry open the metal tabs on the injector clips.
Get your multimeter ready along with a piece of paper so that you can record the values you get from each cylinder. Start at cylinder #1 ( closest to the timing belt ) and test your way down the engine until you are done. This is the big part of our how to test Honda Civic injectors guide, and here’s how to measure the resistance in your Honda fuel injector.
- Put multimeter into Ω Ohms mode
- Touch leads to injector terminals
- Note internal resistance of your Civic injector
- Record injector value move to next injector
The results of your how to test Honda Civic injectors test should net a resistance range between 5-7 Ohms. Make sure the leads of your multimeter do not touch each other for an accurate reading. Don’t be afraid to re-test should you find yourself doubting yourself. Remember this test should be conducted on an engine that’s warm.
Hopefully, you will have found one injector whose range is far out of or even showing as open. This means the injector is dead and must be replaced. The part number for this Honda Civic fuel injector is 06164-P8A-000, as well as 06164-PGK-A01. If your Honda dealership doesn’t have this part around, try the Acura in town for part number 06164-P8A-A00.
You may need other replacement items as well, like a new set of Honda fuel injector o-rings. If you are servicing your Honda Civic fuel rail and injectors, you will also need new guides and seals. These Honda fuel injector fuel seals are available as complete sets, making this install very easy.
Need a set of upgraded Honda Civic fuel injectors for a SOHC or DOHC engine? Check out the ultimate package of BLOX Racing fuel injectors.
Part numbers 16074-ZY3-000, 16472-P0H-A01, 16473-P10-A01, 16474-PT2-000, 91301-PLC-000 all apply and can make your repair job a snap. Have any questions about our how to test Honda Civic injectors guide? Leave us a question or comment below!