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If you don’t feel confident about your electrical skills, then let us show you how to test purge valve with multimeter.
It is pretty easy, and you’ll soon find out whether you need to get rid of your purge valve or not. As long as you have a working multimeter, you’ll be OK.
Before we move any further, let’s take a look at some of the most common problems you might run into if your purge valve went bad.
Common Purge Valve Problems
Here’s a list of some of the most common problems drivers might experience if the purge valve is not working:
Purge Valve Stuck Open
The purge valve gradually opens up as you start up the engine, and it shuts off as soon as you turn off the vehicle.
So why is the valve stuck open? Typically, this is caused by a mechanical fault inside, keeping it open after the engine is off.
If you don’t know if your purge valve got stuck open, your scanner should display codes like “p0442” and “p0445.”
Keep in mind that your purge valve runs off of a vacuum. So, if you have a vacuum leak, it will mess up your vehicle’s performance.
For example, you might have a hard time starting up the engine, and depending on how bad the leak is, things could get pretty bad for your engine.
High Emission Levels
If your purge valve got stuck closed, all those harmful components wouldn’t go back into the engine. Instead, they will come right out of the exhaust, increasing all the pollution going into the environment.
Poor Gas Mileage
If the purge valve is stuck closed, your gas mileage will decrease. So, if you noticed that you’re paying way more money than you usually do for gas, you might want to check your purge valve.
How to Test Purge Valve With a Regular Multimeter
Got your multimeter by your side and want to learn how to test purge valve with multimeter? Then follow these simple steps:
1. Shut off The Engine
Before getting started, make sure that the engine is turned off. After that, wait for at least 30 minutes before testing the purge valve.
2. Find the Purge Valve
Generally, the purge valve is located on the engine intake next to your throttle body. If that’s not the case, look around the fuel tank. For more information about your valve’s location, refer to your owner’s manual.
3. Set up Your Multimeter
To test your purge valve, insert the black cable into the “COM” jack, and then take and plug the red one where it says “VΩ.” Next up, set the multimeter to continuity, which has a Wi-Fi symbol. If your unit does not have continuity with tone, turn the wheel to the Omega letter or “Ω.”
4. How to Test a Purge Valve
Grab your multimeter leads and insert them inside the purge valve’s pins. If your meter beeps, it means that the purge valve has continuity.
If you’re getting anything from 22.0 to 30.00 ohms, your valve is still in great shape, and you have nothing to worry about.
How to Test Your Vent Valve With a Multimeter
Here’s how to test a vent valve with a multimeter:
1. Set Up The Multimeter
Set up your multimeter leads. The black lead goes on the “COM” jack, and the red one on the “VΩ” jack. Next, set the multimeter to continuity.
2. How to Test Vent Valve With Multimeter
Hook up the positive lead to the positive terminal and negative lead to the negative terminal. Depending on your manufacturer, your results might change. But if it beeps, it means that there’s continuity.
3. Blow the Vent Valve
Get some straws and hook them up to your vent valve. Now blow through one of the straws, and you should hear a “clique” sound, indicating that the unit is still working.
If you got stuck somewhere, watch this video:
Frequently Asked Questions
If you’re about to test or replace your purge valve, consider the following information to properly learn how to test EVAP purge valve:
What can happen when a purge valve goes bad?
- If there’s something wrong with the purge valve, your engine’s performance will drop. For example, you might have a hard time starting up the engine. It could randomly shut off as you’re going down the road.
Can I drive with a bad purge valve?
- Yes, you can drive with a purge valve. However, the likelihood of destroying other parts of your vehicle is pretty high. So instead, take the car to a certified professional to replace your purge valve.
Is it easy to replace a purge valve?
- Replacing the purge valve is extremely easy. But if you can’t be bothered to replace it yourself, then expect to pay anywhere from $110 to $170.
Can a purge valve be repaired?
- Yes, you can fix a purge valve. But they’re relatively inexpensive. So, you’re better off getting a brand new unit.
As you know by now, learning how to test purge valve with multimeter is one of the easiest things you could do. It’s not rocket science, and anybody with some spare time can pull it off.
And if you’re bold enough to test your purge valve on your own, we’re pretty sure you can also replace the purge valve and save yourself some money. With that being said, we hope that you can now confidently test your vehicle with a multimeter.