bad pcv valve symptoms
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- Опубликовано: 3 ноя 2023
- Is your car showing warning signs like a Check Engine Light, rough idling, or excessive smoke from the exhaust? It might be a malfunctioning PCV (Positive Crankcase Ventilation) valve! In this informative video, we take you through the ins and outs of bad PCV valve symptoms and what you can do about them.
Learn to identify eleven common indicators of a faulty PCV valve, from engine misfires and high idle RPM to poor oil economy and sludge accumulation. We'll explain the importance of addressing these symptoms promptly to maintain your vehicle's performance and longevity.
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Thank you for watching, and happy wrenching! 
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I've heard about malfunctioning PCV valves from a number of sources over the years, but never took the time to really dig into the specifics. Your detailed explanations of the possible impact of a failed PCV valve were super-clear and informative. I've been seeing light white smoke from my exhaust pipes over the past 10K miles or so, even when the engine is hot, which was one of the symptoms that you mentioned in your video. I'll be replacing the PCV valve to see if this corrects the problem. Thanks for your super-useful information!
Thanks for the comment. Smoke is one symptom. Open oil cap or dips stick and check the pressure
I just had my new bought 2015 Town & Country diagnostic test done by the Chrysler dealer and one of the items noted was PCV valve leaking. This repair cost me $319.00, of which $119.00 was for parts & $199.95 for labor. I truly did not realize how important this repair was. Thank you.
Thank you. You know now
Man, the part & hose would have costed you just under $50.00 ..
You could have saved so much money by doing it yourself.
It's really simple
@@Oden-Heinrich Nah, easily under $20.00. The pcv valve is like a $5 part alone at autozone for my vehicle. Dealerships are robbery.
@GLHF Yeah, they redesign the pcv valve for this engine.
It's 2 bolts opposed to 3.
The old hose also won't fit the new pcv valve, so you're buying a new hose as well. They both come to around $50-ish to buy as a pair, even at Autozone, for the Pentastar 3.6L ..
I'd never buy or take anything to a dealership other than for programming.
If you can find someone locally and pay $50 dollars for same work. Part is cheap and takes 10 minutes to change. Knowledge is power.
When a PCV valve malfunction, the usual sign is engine oil will accumulate at the air intake recirculation hose.
Your right. Too much pressure.
Will high pressure air come out of oil cap
@@stevechavez5882
If PCV value bad Most time sucking air in. But we found couple of vehicles air blowing out
@@stevechavez5882
Most time it’s suck in( when vehicles run very difficult to remove oil cap when PCV VALVE bad)
U dame great
This little under $10 part for some engines plays a major role in your engines performance and emissions sensors, if you ignore this little part or ignore a clogged hose if you just have a hose, will make a code reader tell you that you are having fuel system problems and map sensor problems and a dead cylinder, whats happening is like a human taking in a whole bunch of oxygen and just letting it out slow like barely at all, now go outside when its a 100-110 degrees and do something that puts a stress load on you that makes you have to breathe more but just try to hold your breathe a bit and after a few minutes you will start feeling weird, think about your engine when it cant breathe good.
Absolutely, the PCV (Positive Crankcase Ventilation) valve may be small, but its role in engine performance and emissions control is crucial. When it malfunctions or gets clogged, it can indeed cause a cascade of issues in your engine.
The PCV valve helps to regulate the flow of gases between the crankcase and the intake manifold. If it's clogged or not functioning properly, it can lead to a buildup of pressure in the crankcase, which can cause oil leaks, decreased engine performance, and increased emissions. Additionally, it can disrupt the air-fuel mixture, leading to rough idling, misfires, and other fuel system problems.
Your analogy of a person struggling to breathe in extreme heat is quite apt. Just as humans need oxygen to function properly, engines need a proper flow of air to operate efficiently. When airflow is restricted, whether it's due to a clogged PCV valve or a blocked hose, it can have significant negative effects on engine performance and overall operation.
So, taking care of seemingly small parts like the PCV valve is crucial for maintaining the health and performance of your engine. It's a simple component, but its impact on your vehicle's operation is anything but minor.
Excellent info. Very helpful. May God bless you.
Thank you very much for your comment. Really appreciated
May god bless you too
متشکرم از شما آقای محترم .
Thank you very much
Changing the pcv valve or hose if you just have a hose, should be done at every major tuneup, you know coil packs and plug wires and new spark plugs.
thank you very much for the feedback
Just cleaned, sealed and replaced all the parts to the breather box for the first time ever! 1995 Honda Del Sol Civic.
What are the benefits of doing this? Better Gas Mileage? More Horse Power?
It really seems to be running much smoother and so far I think it's getting better gas mileage.
Just did it a few days ago so haven't driven it much to know yet about gas mileage...
Wow. Good job
And
save money
Good experience
Thank you for much for sharing your experience
Well done
The PCV valve doesn’t allow fresh air in. It recirculates blow by gasses back into the manifold.
The intake breather hose brings in the fresh air.
Thank you for your comment! You're absolutely correct. The PCV (Positive Crankcase Ventilation) valve's primary function is to recirculate blow-by gases back into the intake manifold, which helps reduce emissions by reintroducing them into the combustion process. On the other hand, the intake breather hose is responsible for bringing fresh air into the crankcase to ensure proper ventilation and prevent pressure buildup. Both components work together to maintain engine efficiency and emissions control. Appreciate your input!
What can make the oil cap filler and dip stick become under vacuum sort of sounds like a soda bottle being open after being shaken a lil or is it ment to be like that bmw m54
It sounds like you might be experiencing some pressure build-up or vacuum-related issues with your BMW M54 engine. When the oil cap filler and dipstick show signs of vacuum, it could indicate problems with the PCV (Positive Crankcase Ventilation) system or potentially other issues related to engine performance or seals. It's not necessarily "meant" to be like that, as excessive pressure or vacuum in the crankcase can lead to various problems, including oil leaks and decreased engine efficiency. It's advisable to have a qualified mechanic inspect your engine to diagnose and address any underlying issues.
@@CLICKANDLEARN-eo5lz yeah ot was the pcv system some how the rubber thing inside the pcv was split fixed now the a 3.2l pcv and oil catch can that returns back to the sump but since driving the car around with the bad pcv I now have a oil leak to the exhaust side on the face of the engine looks to be a either the exhaust cam sensor oring vanos solenoid ornig or vanos gasket (my opinion as noting is coming from valvw cover gasket
Will a faulty pcv valve release a burnt like smell through the exhaust? No visible smoke though.
Better to get professional advice. Some times vehicle has another issue sorry
Like someone else commented, pull it out of the pan take it off the hose and spray brake kleen or whatevers' handy.
thanks for the comment
hi so i have a audi a 3 i have bought and its smoking out the exhaust im thinking its egr but it could be the pcv valve gone what so do u recon
Both the EGR (Exhaust Gas Recirculation) system and the PCV (Positive Crankcase Ventilation) valve are potential culprits for smoking issues in a car like your Audi A3. Here's a breakdown of each:
EGR System: If the EGR system is malfunctioning, it could lead to excess exhaust gases being reintroduced into the combustion chamber, potentially causing smoke from the exhaust. Common symptoms of a faulty EGR system include rough idling, engine knocking, and decreased fuel efficiency.
PCV Valve: A malfunctioning PCV valve can cause excessive pressure buildup in the crankcase, leading to oil leaks and ultimately smoke from the exhaust. Symptoms of a faulty PCV valve may include high oil consumption, rough idling, and poor engine performance.
To determine which component is causing the smoking issue in your Audi A3, you may need to perform diagnostic tests or consult with a qualified mechanic. They can use diagnostic tools to check for fault codes and perform visual inspections of the EGR system and PCV valve. Additionally, they may conduct a compression test to assess the overall health of the engine.
In any case, addressing the issue promptly is essential to prevent further damage to your vehicle and ensure its optimal performance.
I replaced mine about 3months ago.and no difference. Engine smokes at idle..blue smoke. Increased oil consumption. Heat in cabin esp from radio area...I got it from aliexpress.tho it was for a golf 4 and mine is lexus gs 2jz...any implications.
You need to check with professional. Could be something developing there.
Could also be the breather pipe is also contaminated if that wasn't replaced with the valve and all indications were pointing to the valve being the issue.
@@CLICKANDLEARN-eo5lz oil in my intake hose....
Blue smoke from exhaust only at idle but never at cold start. Only idling for a bit like in traffic or at a stop? Could this be it? Wrx 2013 with brand new engine
Thank You For Your Feedback Sir! the blue smoke at idle in your 2013 WRX is likely not due to the PCV valve, which usually causes white smoke. It's important to consult a mechanic for a proper diagnosis, as it could indicate oil burning issues. Safe travels!
Coolant
@@wendy8875 nope was bad valve seals
@@wendy8875 coolant is white btw
@@RacingCoco thanks for the info
I have a 2.0 TSI with HF series oil catch can but still getting blue smoke from the exhaust, pcv valve and catch can bad?
Should I try the racingline ones?
Sorry to hear you're still experiencing blue smoke despite using the HF series oil catch can. While the PCV valve and catch can could be potential culprits, it's essential to thoroughly diagnose the issue before considering replacements. Racingline catch cans may offer different features or performance, but they might not necessarily solve the underlying problem if it's related to another issue in the engine. I'd recommend consulting with a knowledgeable mechanic or specialist to diagnose the root cause accurately before investing in new parts. They can provide expert advice tailored to your specific situation. Best of luck in resolving the issue!
I have an exhaust smell (moreso on colder startups). PCV Valve changed a few months ago. A bit lower (than I expect) gas mileage. Will have to see if there is an exhaust leak somewhere
Could be exhaust. Could be fuel leak from injector seal or pipe
Did you reset your ECU afterwards? All the fuel trims stored in memory could well be for running with a failing pcv valve, resetting the ecu will allow everything to operate in the initial learning mode with the car components working as they should be.
@@thekhaosrider
Yes need to rest code. That’s it’s
Did u figure it out?
@kaytube5645 nope. I just have a Basic Bluetooth OBD2 reader. Not if if it truly resets the ECM (ad others have mentioned to do). Gonna try taking out the oxygen sensors and cleaning them (carefully) with some brake cleaner or throttle body cleaner (whichever is appropriate).
Else look at changing a mid pipe gasket or similar. Maybe change all bolts too, while I'm there.
Years ago this was the engine crankcase breather pipe nothing more. New cars cannot breath and become unhealthy.
ChatGPT
The concept of an engine crankcase breather pipe, also known as a crankcase ventilation system or PCV (Positive Crankcase Ventilation) system, has evolved over the years in automotive design. Its primary purpose is to vent harmful gases and excess pressure from the engine's crankcase to prevent various issues such as excessive pressure buildup, oil contamination, and emissions of harmful pollutants.
In older vehicles, the crankcase breather pipe may have been a simple vent that released gases directly into the atmosphere, which could contribute to air pollution. Modern cars have more advanced PCV systems that route these gases back into the intake manifold to be burned in the combustion process. This helps reduce emissions and improve fuel efficiency.
If a modern car's PCV system is not functioning correctly, it can lead to various problems, such as increased oil consumption, reduced fuel efficiency, and potential damage to engine components. Regular maintenance and checking of the PCV system are essential to ensure the engine operates efficiently and cleanly.
It's essential to follow the manufacturer's recommended maintenance schedule and use quality parts and fluids to keep your car's engine in good health and minimize its impact on the environment. If you suspect your car's PCV system is not functioning correctly, it's advisable to have it inspected and repaired by a qualified mechanic
thank you very much for the feedback
really appreciated
If there is a leak from the air intake and pcv hose, would it cause the same problems ?
A leak from the air intake or PCV (Positive Crankcase Ventilation) hose in your vehicle can potentially cause various problems, but the specific issues it might lead to can vary depending on the location and severity of the leak. Here are some general problems that can result from such leaks:
Decreased engine performance: Air leaks in the intake system can allow unfiltered air to enter the engine, which can disrupt the air-to-fuel ratio and affect combustion. This may result in decreased engine power, rough idling, poor acceleration, and reduced fuel efficiency.
Check engine light: A leak in the intake or PCV system may trigger the check engine light on your vehicle's dashboard. This can happen if the leak affects the proper functioning of sensors that monitor air intake or emissions.
Poor fuel economy: Unmetered air entering the engine can lead to a lean air-fuel mixture, which may result in poor fuel economy as the engine tries to compensate by injecting more fuel.
Increased emissions: Leaks in the PCV system can allow unfiltered crankcase gases to escape into the atmosphere, potentially increasing harmful emissions. This can also impact your vehicle's compliance with emissions regulations.
Rough idling and stalling: Air leaks can disrupt the engine's idle stability and lead to rough idling or even stalling in extreme cases.
Engine damage: In severe cases, prolonged exposure to unfiltered air or excessive oil vapor escaping from the PCV system can lead to engine damage over time.
It's essential to address air intake and PCV hose leaks promptly to prevent these issues and maintain your vehicle's performance and reliability. The specific problems and their severity will depend on the size and location of the leaks, as well as the make and model of your vehicle. If you suspect such leaks, it's advisable to have a qualified mechanic inspect and repair the affected components to avoid potential damage and ensure your vehicle operates as intended.
thank you
Hey there! Thank you for this great video. I have a question: can a bad PCV go wrong and still not throw a code?
Hello! I'm glad you found the video helpful. To address your question, yes, it's possible for a malfunctioning Positive Crankcase Ventilation (PCV) valve to not always trigger a diagnostic trouble code (DTC). The PCV valve's primary function is to regulate the flow of gases between the crankcase and the intake manifold. If it fails or becomes clogged, it can cause various issues such as poor engine performance, increased oil consumption, rough idling, and even excessive smoke from the exhaust.
However, whether a PCV valve issue triggers a diagnostic trouble code depends on the vehicle's make and model, as well as the specific conditions of the malfunction. Some modern vehicles have sophisticated engine management systems that can detect certain faults and trigger corresponding codes, while others may not have sensors or monitoring systems in place specifically for the PCV valve.
Additionally, if the issue is intermittent or hasn't reached a threshold level of severity, it might not trigger a code immediately. It's also possible for a PCV valve problem to manifest in ways that aren't directly linked to a specific code, making diagnosis more challenging.
If you suspect a problem with your PCV valve but aren't seeing any codes, it's still worth investigating further, especially if you're experiencing symptoms like those mentioned earlier. Regular maintenance checks, including inspection and potential replacement of the PCV valve as part of routine service, can help prevent issues from escalating.
Thank You
I have a 2015 navigator i got the pcv valve changed but im still getting a code,help please
If you've already replaced the PCV (Positive Crankcase Ventilation) valve on your 2015 Navigator but are still encountering a trouble code, there are a few steps you can take to troubleshoot the issue:
Double-Check Installation: Ensure that the new PCV valve was installed correctly and securely. Sometimes, improper installation can lead to continued issues.
Inspect PCV System Components: Check the entire PCV system, including hoses, connectors, and the PCV valve itself, for any signs of damage, leaks, or blockages. Replace any damaged components and clear any blockages if found.
Check for Vacuum Leaks: Vacuum leaks in the PCV system or elsewhere in the engine can cause issues with engine performance and trigger fault codes. Use a smoke test or other diagnostic methods to check for vacuum leaks and repair them as needed.
Scan for Additional Codes: If you're still receiving a trouble code after replacing the PCV valve, use an OBD-II scanner to check for any additional codes. Sometimes, there may be other underlying issues contributing to the problem.
Check Engine Performance: Monitor the engine's performance closely for any signs of abnormalities, such as rough idling, misfires, or excessive oil consumption. These symptoms can provide clues to help diagnose the root cause of the issue.
Verify PCV Valve Compatibility: Ensure that the replacement PCV valve is compatible with your specific make and model of vehicle. Using an incorrect or incompatible PCV valve can lead to issues.
Reset Fault Codes: After performing any maintenance or repairs, use an OBD-II scanner to clear the fault codes from the vehicle's computer. This will reset the system and allow you to monitor if the issue persists.
Seek Professional Assistance: If you're unable to diagnose or resolve the issue on your own, it may be necessary to seek assistance from a qualified mechanic or dealership. They can perform a more thorough diagnostic scan and recommend appropriate repairs.
By systematically checking these areas, you should be able to narrow down the cause of the persistent trouble code and take appropriate action to address it.
Thank you so much I'm at my end it doesn't show any of the problems that would say the new pcv is bad truck runs good my Mechanic says it may just be age and the 260,000 miles that it has and the dealer is just waiting to break my pockets
You can't even tell it's running its so quite
PCV are inexpensive and should be changed every five years anyways. While you do your basic tune up change the ERG valve at the same time along with the air cleaner and oil change. The MAF sensor is typically OK but can also be cleaned at this time with just 50% rubbing alcohol in a spray bottle. After cleaning the MAF sensor just let the MAF sensor dry itself in the sun for 30 minutes before reinstalling. No need to buy that expensive MAF sensor cleaner at the auto-parts store.
Thank you for sharing these helpful tips! Regular maintenance is key to keeping our vehicles running smoothly. Changing the PCV valve every five years, along with other components like the EGR valve, air cleaner, and performing an oil change, is a great practice to ensure optimal engine performance and emissions control. Cleaning the MAF sensor with rubbing alcohol is a cost-effective solution, and letting it dry in the sun is a smart way to ensure proper reinstallation without needing to invest in expensive MAF sensor cleaners. Your advice will surely help many DIY enthusiasts keep their vehicles in top shape without breaking the bank. Appreciate your contribution!
Easily cleaned or replaced.
Yes sometimes
أحسنت
I’m not sure what you says.
Thank you
He said “well done” 👏🏼
@@zouhairfarahat1540
Thank you
My vehicle smoke when the engine sits for awhile and it also loses oil
Thank You For Your Feedback Sir! It can be a symptoms of bad PCV valve. also It can be Head Gasket Failure, Overfilled Engine Oil, Clogged Breather System, Worn Piston Rings, Damaged Valve Stem Seals or Worn Engine Seals or Gaskets. It is better to contact a mechanic.
I thought it was funny that the intake stacks in the opening photo had tennis balls in them. Obviously it’s in storage… Hopefully?…. Just don’t start the engine with them in ther. 😊
Thank you for feedback
Dodnt know it causes misfire
Yes some time looks misfire. Because of air pressure
Cant stand these AI voices
thanks for the feedback
It’s like the fart of the car
Your right ✅