HOW TO TEST A PURGE VALVE. Everything You Need To Know.

[@paulkomn946]

the best demonstration on youtube for the purge valve

[@PistonShack]

Thanks Paul!

[@humanresource9659]

Please continue making helpful videos like this. Do not get discouraged and do not give up. Thank you

[@PistonShack]

Thank you, I will.

[@jimmyjimjims7483]

I like the use of multiple solenoids to bring sense to the point. I got a bad evap purge solenoid straight out the box and I was able to verify 100% it was broken, thanks!

[@PistonShack]

Hi Jimmy! Thanks for you feedback. As we know nowadays - new doesn't mean good (SMA). I am glad it helped you out. Cheers!

[@MiguelRodriguez-dy9tc]

One of the best explanations of how it works and how to diagnose it. Thanks for the video.

[@PistonShack]

Glad it helped Miguel! Thanks for your feedback.

[@timb7775]

I've fixed purge valves by spraying carb cleaner in both ports and shake it all around, drain and repeat a few times. Let it dry out over night and they work fine afterwards.

[@PistonShack]

That's sounds great Tim. Thanks for sharing you repair.

[@daviddowns7552]

thats a genius idea. i need to try.

[@martymartin2894]

What about wd40 would it work same.

[@timb7775]

@@martymartin2894 I haven't tried wd40 but I wouldn't. Wd40 is a solvent but also a lubricant so it would probably leave oils inside the purge valve. I will also add that it is probably best to replace the purge valve, while after cleaning mine it did work I ended up getting a code a few months later and it was the purge valve again.

[@martymartin2894]

@@timb7775 ok thanks

[@wes11bravo]

Excellent video - a great combination of the operation of a purge value along with how to test this operation.

[@PistonShack]

Thanks Wes!

[@larrymusk6581]

Great video, my daughter's Dodge Ram Pick Up just started having issues this last week. I wasn't 100% how to check the Purge Valve and she happens to have the same exact one as your video. Hope it's the valve, through Rock Auto it's around $20.00 and the canister is over $80.00. Very much appreciate bro.

[@PistonShack]

Good morning Larry! Glad it helped you out! You're so welcome) BZW, thanks for your feedback. God bless!

[@edwardcrews3766]

8j5

[@wimzrxsf]

Great video you made my life a lot easier I have been going nuts trying to fix the problem on my Lincoln thanks again.

[@PistonShack]

Glad to help Brotha! Thank Ray)

[@osmankaplanoglu6913]

Canister:)

[@osmankaplanoglu6913]

Going nutsss...

[@PistonShack]

@@osmankaplanoglu6913 Hi Osman! I hope it helped you out.

[@shinola228]

I have a very minor vacuum leak - going to try your test. Thanks for making the video.

[@DavidRivera-xb9mi]

Great Video, thank you making this video it is very helpful for people like me and others trying to do it on your own to Educate ourselves and at the same time save some money, thanks again Piston Shack

[@PistonShack]

Hi David, Thanks for watching. Let me know if you have any questions. Glad to help.

[@chadhouse1375]

David Rivera These seem to be a problem with Toyota Corolla from what I’m experiencing. Would this be the problem with a P2401 Evaporative Emission Leak Detection Pump,or is this a different issue? Awesome video,just wondering if the evap purge solenoids are bad on my 05 and 07 Corolla’s. Thanks,Chad

[@PistonShack]

@@chadhouse1375 Hi Chad, p2401 could be related not only to the leaks detection pump which controlled by ECM. It could be the circuit wiring issue (very common) and also it might be any other EVAP system related problems down the road. I would test ground, power and signal ect at the pump, then look for any leaks. Pumps intend to fail over time as well. Take the pump out and test for any defects. Let me know if you found the cause or you have any questions. TNX.

[@donha426]

This is a great video to learn how to test valves. Thanks.

[@PistonShack]

Glad it was helpful Don!

[@srj3266]

Thank you for very clear instructions

[@PistonShack]

Glad it was helpful!

[@tony1959rams]

Thanks ill go out and get one of those pumps. I just got a new skill.

[@grdnlt]

this is great, thanks for the education

[@PistonShack]

Hey Gordon! My pleasure! Thanks for your feedback.

[@antho9921]

Thanks for making this video, it’s very helpful

[@PistonShack]

Glad it was helpful Antho!

[@thabomosupi3312]

Great Presentation, Thank you Sir.

[@PistonShack]

You are most welcome

[@davedeatherage4902]

Thanks for the informative video . Helpful 👍🏻👌👌

[@PistonShack]

My pleasure 😊 Dave!

[@rafaelnunez8738]

Take my money!!!!! I will try tomorrow.👍

[@maingoriginal4709]

great demonstration I dont think I left mine on the vacuum long enough

[@PistonShack]

Thanks, Main G. Tried my best to make it straight to the point without much fluff. Cheers!

[@beachwave2]

Great explanation

[@PistonShack]

Glad it was helpful! Thanks Sam S!

[@BLOWNDADDY1]

I would just like to state that just because it passes the bench test does does not mean it's good. They can work intermittently down the road and make the check engine light come on. I had 2 do this, and changing them out fixed the problem. Also just because a part is brand new in the box does not mean it's always good. Took me a few years of experience to figure this out. Just passing this information on, to save maybe you from changing everything else, and then coming back to the original problem. (Pick a Part saves money)

[@PistonShack]

Thanks for sharing your experience! That's good point BLOWNDADDY1. Cheers!

[@davidruiz5383]

Great video, I have never seen a complete test as you have done. What I have seen is unplug the tubing from Evap purge while engine is on and warm and then place Finger on the Evap Purge Solenoid and if there IS SUCKTION THAN EVAP PURGE SOLENOID IS GOOD. Question: the test with finger a valid test. Hope to hear from you. Thanks and God Bless

[@PistonShack]

Greetings, David! EVAP solenoid finger test is a basic check for the electromagnetic valve operation. It's a valid test.

[@Barrys_Workshop]

Great video - thank you

[@v1kng99]

Great video

[@PistonShack]

Thanks James!

[@Chalkida24]

Thank you sir! 👍

[@MowSow]

Very good !! Such a complete video Thanks

[@PistonShack]

Most welcome!

[@MariaGonzalez-ei1pv]

Awesome video..

[@PistonShack]

Glad you liked it Maria!

[@farradaghajanian9846]

Thank you this helped so much

[@PistonShack]

Glad it helped Farrad!

[@vjxpiroevo9263]

The pressure test is the most accurate I guess!

[@PistonShack]

Yup. So far!

[@pachinmarin3528]

What I find, is that this purge valves when clicking are working but when leaking is because have some dirt inside the rubber that seal the vacuum, some W40 can help if not maybe you can open and clean the valve, I fix 3 of them this way. Good luck

[@glengarbera7367]

What a great video

[@PistonShack]

Glad you enjoyed it!

[@brassfieldlandscaping]

Very helpful

[@PistonShack]

Glad it helped!

[@vecinaso]

Thank you for your information

[@PistonShack]

My pleasure Isrrael!

[@mrayco]

Great video ❤❤❤

[@PistonShack]

Thanks for the visit

[@8683roy]

Great video! What kind of code would you get when the purge valve doesn't hold vacuum? Would it be a large leak code or a small leak code or some other code?

[@Fordgroup00]

👍 thanks!

[@PistonShack]

You bet!

[@williamgrissom9022]

The pressure may increase slightly (vacuum level drop) while sitting since the air cools off when pressure is reduced then it slowly heats back to ambient temperature, raising the pressure. Similarly, if you pressurize air, it heats then the final pressure relaxes a bit as it cools.

[@diehardcat]

I have a Toyota purge valve that behaves exactly like the small valve you tested in this video. But when I read the service manual which shows you how to test the valve, it says if the valve is good, when it's off, outside out of the car like in this video and no voltage applied, you can blow from the canister side port and the air would come out of the intake side port with 'little difficulty'. This confuses me because, in that condition, should there be air coming out of the intake side port at all?

[@rickeygoodman7667]

I like the video buddy great job I just need to get more on meters and testing machines like what you got I have a Dodge Caravan 1995 I don’t know if the PERT sound is out

[@PistonShack]

Hi Goodman! How all is going? I like Caravans, they are reliable units. My bother has one. Check purge solenoid valve for leaks if it holds vacuum. Let me know if you have any other questions.

[@atigang]

Thank you.

[@PistonShack]

You're so welcome Gan!

[@h.d.5779]

Iba a escuchar musica, pero me llamo la atencion el video, ya para finalizar mi tarea Do you test it with 12 V?

[@c-7nanotechcleaner652]

nice demo

[@PistonShack]

Thank you!

[@danielisrael3218]

Great job

[@PistonShack]

Thanks, Daniel!

[@55chevytruck]

Thanks for your vid. I got an 02 caravan with a purge valve that looks just like the one you have. When I put a vac on the bottom "canister" nipple and it holds but the top nipple " manifold" will not even pump up. Is it bad? Did olm test and got 14.7. Thanks

[@salvadorcoronado5370]

Grey videos congratulations here you like. One question do you have a vent selenoide video please a need to learn how to check thanks

[@PistonShack]

Any luck with your repairs? I have the video how to test vent solenoid on Nissan, check this one out: We Fixed It! P0448 P0447 EVAP VENT CONTROL CIRCUIT SHORTED OPEN NISSAN PATHFINDER, FRONTIER, XTRERRA kzbin.info/www/bejne/n6aXmJeNqq6ka9E

[@koreya211]

What are the alligator clamps hooked up to? Will a small battery do?

[@PistonShack]

Yup, I used 9v small battery.

[@8683roy]

I’m trying to determine if my purge valve leaks enough to cause a small evap leak code. I put my vacuum pump on the port that goes to the intake manifold & pumped it to 15 in Hg. Do you think loosing just 0.25 in Hg over a 10 minute time span would be enough to cause the code?

[@terrencecarter27]

If you don't have a hand pump, could you use a bike pump in its place to test.

[@PistonShack]

No you need vacuum pump, not just pump.

[@amhfpv]

i have the same issue with the big PURGE VALVE you test but still light is on if you can tell us what is the next steps to check cable wiring from valve to ECM

[@markochman75]

What are you using specifically, to check the clicking, with your multi meter? Battery power?

[@PistonShack]

Hi Mark, you can use power probe to energize solenoid. I used battery to power to power it up. Thanks for watching.

[@Antoniocool86]

I tested my purge valve and it is good but my car is not given the signal to open the valve. What could the problem be? 2016 Subaru legacy 2.5

[@WV591]

good work. tu

[@PistonShack]

Thanks)

[@u.s.a.198]

Ty

[@siremschannel5782]

please answer i got 33.3 and no continuity is that a bad valve? but no response if i install to the socket but i direct to the battery it open

[@holyman7820]

Good video if is open how can I close it I but a new one and it does the same thing no continuity

[@solomongrundey]

My perge valve clicks like hell when the motor is on, is it supposed to do that? Clicks like crazy

[@PistonShack]

That's could be okay. Constant clicking is ECM modulated impulse signal for the solenoid control. It should stop at some point. If not just try to unplug the connector and cycle the key. What vehicle are you working on?

[@aerodynamik9771]

For those asking. To activate the solenoid simply connect a wire lead to each negative and positive terminal posts on your battery and touch the pins. If it clicks and opens it means is good. If it doesnt click that usually means the valve is no good, its usually stuck open wont hold pressure which is no good.

[@Dcthetruth85]

Can it still be faulty with a audible click.

[@neodiy]

Does the purge solenoid constantly i meant almost frequently purge the fuel vapor into the intake manifold?? I am asking this question because on OBD2 reading it seems the evaporative valve only does it at random meaning not always purging....So i am curious if this is normal or something wrong with the fuel pump

[@PistonShack]

It purges vapour form time to time.

[@neodiy]

@@PistonShack from time to time means it does not do it all the time right? it happens randomly?

[@brelofps]

I replaced the purge valve on 2012 fusion because i got a engine light code saying “very small leak” within the emission system. Replaced it, car runs great, but it makes a clicking noise is this normal?

[@sr8shoota]

I have a 2008 ford taurus x . I am not getting anything from a 12.4vdc battery.

[@sasquatchwatching5631]

The purge valve ! is that supposed to open and close only ?Or does the voltage regulate the volume of air moving thru the vacuum tubes also because mine makes leaking harmonic sound when I shut down the engine

[@PistonShack]

If purge valve solenoid stuck open I just go and replace it. Purge valve should be closed when not energized.

[@renejacques8288]

What is the green knob and what does it do? I have a '99 Ford expedition w/ the green knob sitting on the purge valve itself. I smell fuel mostly near the charcoal canister in the rear of the vehicle.

[@PistonShack]

Hey Rene! Green know is a EVAP system diagnostic port to connect smoke machine to locate EVAP system leaks. Do you have any EVAP related DTCs (codes)?

[@renejacques8288]

@@PistonShack Yeah, 442. I unplugged the the purge valve, disconnected the line from the canister and started the vehicle. There was no suction which is normal. I think my problem is in the rear of the vehicle by the canister, that's where I usually smell fuel vapor. I have to fill up every so often. One more thing, I might make my own smoke machine. Does the pin in the middle of the port need to be pressed for smoke to go past it or no? Thanks for replying.

[@markochman75]

Another words, what are you using to make the purge click like that?

[@PistonShack]

I used battery to power purge valve solenoid.

[@jessecobbs8864]

2012 genesis purge valve has a point arrow on it going to gas tank,is that's the right way

[@PistonShack]

Hi Jessie, You right on some makes and models you can find label or arrow points. Thanks for watching and subscribing. Best wishes!

[@brayantheguru]

When i change the purge solenoid do i need to vacuum the evap system ?

[@PistonShack]

No, I won't do it.

[@angelabarr3743]

Hi I have a Renault Clio it failed emission test for mot. Can a solenoid change help, as my check injectors come on all time thanks

[@MrLeo92335]

Great video man,my purge valve for my 2001 Ford e350 superduty econoline doesn't click when I apply 12v power to it,I even went to the junk yard and the other one doesn't click either, I don't hear any movement when I apply power to it, do you think both of them are bad or that's just the way they are?

[@PistonShack]

Hey Louie! Glad it helped you out. Thanks for sharing your experience. Cheers)

[@gabrielq.906]

What if it holds perfect vacuum on the manifold side but slowly looses vacuum on the canister side? I'm truly stumped why only one side would leak and how come nobody tests the canister side or is the canister side suppose to loose vacuum?

[@PistonShack]

Hi Gabriel! Sorry for such a late reply. Canister should be sealed and hold vacuum. Could be issue with one of the o-rings or canister has crack. I would replace o-rings first that should help. Cheers)

[@bonniedozier3039]

My purge valve is showing 03.4 to 03.5 is it bad that's what it is showing on my digital multimeter.

[@slyztercoreveanged3175]

Can i ask, i already replace with new one. And then after a while i start making aound again. Change for new one and the problem is still persist. At 1st it is ok but for a while like a week then it start making sound again like sewing machine. I dont know if i got bad canister valve or actually my system make the valve failed

[@ghostlygaming8674]

How did u energize the valve? Can I use a multi-meter or do you need a seperate tool?

[@PistonShack]

I used regular 9V or 12V battery of the test.

[@oFILTHYox]

Yeah some connector wires and 9v battery

[@MI325A]

Hi. Thank you for your video and the various testing. Where can I get one of the vacuum testers like you have? Thank you again. Be safe and healthy (you and yours). Have a great day.

[@PistonShack]

Thanks a lots M A. You can find Hand Held Vacuum Pressure Pump Tester Kit Brake Fluid Bleeder Bleeding Kit at local autoparts store or online. They are around 50$ Take care)

[@mb1636]

Harbor freight has it for $25.

[@sbond1963]

How many volts do I need to test with?

[@PistonShack]

3-6 volts will be enough. I used 9v small battery for the rest.

[@SuperMadmax4]

In some Videos it Shown 27-29 ohms Considered Ok but Below that its Faulty

[@PistonShack]

Interesting, thanks for letting me know.

[@SuperMadmax4]

@@PistonShack Tested with Nissan K5T4691 Canister Purge Solenoid Valve ..If i could have the Photo i could share.I tested with 9V Portable Battery

[@mariogrant3499]

Hey gm....I have a Nissan b15 wish side go on the intake m.....

[@PistonShack]

I ain't sure with b15 design but one side of the purge valve should get connected to the upper intake manifold or somewhere to the air induct pipe passed maf sensor.

[@1776FreedomNow]

Are there Purge valves that are designed to stay open until you apply voltage. Another words the other way around where applying voltage closes the valve?

[@PistonShack]

Yup, correct. Normally purge valve is closed. ECU gradually opens Purge Solenoid valve allow fuel vapors from charcoal canister get burned inside the engine.

[@1776FreedomNow]

@@PistonShack are there any Purge valves that are designed the other way around. Where if you pull out the purge valve and bench test it. And blow into it. Air goes through. And then when you apply voltage to the purge valve the valve closes and does not let air through?

[@PistonShack]

@@1776FreedomNow Vent valve solenoid at the charcoal canister works in a way you described. Purge valve opens when coil energized.

[@LuisPerez-ty5gg]

How you now what is positive and negative on valve

[@PistonShack]

Hi Luis, it doesn't really matter how you connect clips.

[@dannyprice7087]

Does this test work for all purge valves? Thanks!

[@PistonShack]

Hey Danny! Theoretically, Yes. It should work on all Purge solenoid valves but some exemptions are possible.

[@dannyprice7087]

@@PistonShack What about a 2002 Focus? Thanks again!

[@AlwaysDiagnoseVehicleFirst]

Good Afternoon my friend! I have a 2003 Dodge Caravan and i was performing an evap smoke test but i have no tool or equipment to use that will allow me to close and open the evap components, what can i use?

[@PistonShack]

Hi brotha! I would check for leaks before PCV (tank-canister-PCV) and after (PCV-intake manifold) with home made smoke machine. Tons of vids on KZbin. Well, without Bi-directional control diagnostic tool you cannot operate solenoid valves without powering them directly how I did in my video. Cheers!

[@panasonicchrome7915]

How to test if the solonoid is stock close?

[@PistonShack]

Won't be much difference. Check if valve holds vacuum and responds when you energizing the coil.

[@codyh2533]

What are you hooking those cables up to for power?

[@PistonShack]

Hi Cody, Those wires are battery ground and power supply to the valve. Let me know if you have any other questions.

[@josephvallejo3160]

Does it matter negative or positive to connect to the purge,,,I used the car batter with test leads and it sparked ,,leads did not touch

[@salvadorcoronado5370]

Thank you for you videos my vent selenoide y through out lot gas by ve t selenoide can you help .e please whit and tip thanks I WEIRING FOR YOU ANSWER THANKS

[@PistonShack]

Any luck to locate the leak?

[@michaelscheinberg3686]

Greetings! I tested my purge valve on my 2006 Town & Country and the vacuum (17 inHg) decreased over a few minutes time; I purchased a new one from Pep Boys (standard motor products) and figured I should test the new one before I installed it. The new one also didn't hold the vacuum! What should I do now? Return it or what?

[@PistonShack]

Hi Michael. Thanks for sharing your experience. I went to local junk yard, pulled one out for 10$, plus got 30 days free exchange or credit. So far no any problems. If valve doesn't hold vacuum bring it back. Sorry for the late reply.

[@salvadorcoronado5370]

Somebody have and a tip to fix my vent selenoide when I PUT GAS pump stops and under my car is a lot gas please any tip help me

[@PistonShack]

Did you find the leak? Seems like charcoal canister doesn't purge properly.

[@khaniftikhar9225]

What time this vacum working

[@PistonShack]

It should hold vacuum at least 5-10 minutes.

[@troyberecz707]

Do you have a video to test relays?

[@troyberecz707]

Excellent video.

[@PistonShack]

Unfortunately, I don't have relay test video. I probably should make one - Complete Relay Test Tutorial.

[@buckmiller6720]

when power was applied to the purge valve while under vacuum the needle dropped to zero. What does it indicate if the needle doesn't drop and continues to hold vacuum?

[@rPkRd-wu3pl]

It's Stuck in the Closed Position.

[@buckmiller6720]

👍

[@pablogomez7519]

I have a 08 grand caravan 3.3 and when I turn on the vehicle you instantly smell fuel. could it be from the purge solenoid? I do have a evap code too

[@PistonShack]

Hey Pablo. Do you have fuel smell inside the van or when you disconnect purge valve?

[@jonleone777]

How did you make the power supply you used

[@PistonShack]

Hey Jon! I used 9v battery. That's it.

[@jonleone777]

@@PistonShack Roger that. Thanks.

[@PistonShack]

@@jonleone777 You're so welcome!

[@dustinbergeron7508]

Mine does have a good ohm reading but it does not have a continuity reading is it good or bad

[@PistonShack]

Hi Dustin, It should read continuity. Does it read ''O.L."? What resistance value did you get? Tnx.

[@dustinbergeron7508]

Well I got a new one and it did stop bringing the fuel smell inside my car but I’m still showing up p0455 and I just changed the vent valve and the fuel cap and the charcoal canister

[@PistonShack]

@@dustinbergeron7508 Hi Dustin, 1) check EVAP system for any small and large leaks before and after purge solenoid. Look for any Evap tubing visual defects. 2) smoke test will help to find and detect any leaks. Its pretty simple to do, just google "smoke test" I will do that first then go to check any electrical issues with circuit. Let me know if you have any questions. Cheers!

[@daviddowns7552]

i need mine replaced. code po446 has came up 2 times. i been eraseing them.

[@mb1636]

So even the purge solenoid tested good on open & close, it can still be bad by leakage @ 4:07, is this right ? 1:12 is my nissan fronty, now i know where purge located, thnx !! I have obd code p0455 😞😞. Any clue issue?

[@PistonShack]

That is correct. It could be ground or power issue down to the solenoid as well.

[@jessecobbs8864]

REMOVE MY PURGE VALVE ON MY 2012 GENESIS THE ARROW ON THE VALVE POINT TO LINE GOING TO CANSITER SOMEONE TOLD ME THE ARROW SHOULD POINT TO INTAKE ENGINE CAN YOU TELL ME WHAT WAY IT GOES.

[@PistonShack]

Good evening Jesse. Normally arrow shows gasoline vapors flow from charcoal canister, where they stored, to the engine intake. PCV solenoid regulates gasoline flow to the engine. I would recommend you to verify the information with your vehicle technical service manual. Another tip, when you mount PCV valve there is usually only one to mount it properly and connected lines to it. Thanks for watching. Let me know how everything is going.

[@jessecobbs8864]

@@PistonShack THANK YOU VERY MUCH

[@PistonShack]

@@jessecobbs8864 You're very welcome Jesse!

[@stankowalski4659]

Didn't say what voltage.??

[@alyameengomaa1048]

How can we test the circuit

[@alyameengomaa1048]

And of course thank you for you're helpful video that's very nice

[@PistonShack]

Hi Aly! Check if you have continuity on both wires. Also it depends how solenoid controlled by the ground or power. Check if you have ground or power on one of the wires. Then you need scan tool to turn valve On and Off to check if ECU controls it or not.

[@PistonShack]

You are very welcome! Cheers and thanks for watching.

[@jjatyou2b]

audio explanation is good enough, hand gestures are distracting.

[@PistonShack]

Thanks for your feedback!

[@vaxuka]

Purge valve working to 8V?

[@PistonShack]

Depends from make and model. Usually power supply to purge valve is 12V

[@vaxuka]

@@PistonShack vw jetta 2012

[@alanvillanueva4541]

how much voltage did you use whith the aligators ?

[@PistonShack]

9v battery

[@alanvillanueva4541]

@@PistonShack Thanks Sr.

[@PistonShack]

@@alanvillanueva4541 My Pleasure!

[@alexrubio9804]

Can this type of Valve cause a crank no start condition?

[@PistonShack]

Hi Alex, No, purge solenoid won't cost no crank / no start condition in 99.9% I will leave 0.1% due to the modern latest made vehicle over engineering nowadays. I'm actually planing to make detailed step by step covering "no crank" and "no start diagnostic" video. I like to share everything I know so far) Cheers and thanks for watching. P.S.: let me know what was cause no start condition.

[@alexrubio9804]

@@PistonShack thanks buddy

[@PistonShack]

@@alexrubio9804 You're very welcome.