Top 11 Symptoms of Bad PCV Valve
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- čas přidán 26. 04. 2023
- What is a PCV Valve?
The PCV valve expels undesirable exhaust gases from the crankcase and recirculates them through the intake manifold to the combustion chamber. These exhaust gases then burn in the combustion chamber instead of going into the environment through the exhaust system.
Bad PCV Valve Symptoms
1) Check Engine Light
2) Smoke from the Exhaust Pipe
3) Lean/Rich Mixture
4) High Idle RPM/Rough Idle
5) Rough Acceleration
6) Poor Oil Economy
7) Engine Misfiring
8) Contaminated filter
9) Engine Stalling
10) Unusual Engine Noises
11) Sludge Accumulation
Disclaimer:
This video is just for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.
Copyright Disclaimer:
Copyright Disclaimer under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use.
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What a difference a valve makes. game changer.
Thank you, robot man! 🙂
Well explained info. Thank you!
Thank you so much for this video متشکرم از شما آقای محترم
Well explained, thank you so much
You know it's a bot, right?
I had all symptoms of this video on my 99 LS Integra 😢 changed out the PCC valve today car runs waaaaaay better🙌🏻 🤩
Very useful video. Thank you so much ❤
Fantastic video. Thanks 👍👌 very very helpful
I've had all of these symptoms because i used a PCV system from a 5 liter engine on my 7 liter engine. The PCV valve was working, but i think the flow was inadequate. With leak down and compression testing, i suspect broken Piston rings and lifters on 2 cylinders. 😔
I have bank 1 and bank 2 too lean codes in my tahoe. I ran seafoam and cata clean through the engine. Code went away for like 2 days
Hey nice vid, i have alot of these symptons but had the pcv replaced 6 months ago, could a pcv fail in this time?
Yeah there are chances that it may fail again
Thanks
I have no trouble code, but car struggles to start but after few tries I can start it but it’s guzzling oil and fuel!
Sometimes it will idle funny and cut out but majority of the time it runs fine.
Also car drives perfect just when you change it takes a while to get the power from the acceleration
Struggling to start the car, excessive oil consumption, and increased fuel consumption can be indicative of several potential issues such as fuel system problems, ignition system issues, worn piston ring issues, PCV system issues or coolant leaks. Given the symptoms you've described, it's important to have a qualified mechanic perform a thorough diagnostic check to pinpoint the exact cause of the issues.
This sounds like you need some new spark plugs / coil packs.
Thnk u ❤❤❤❤
Could this cause an oil leak and smell in the cabin? After warm up 750 is idle speed. Is this clearly PCV damage? In the long term, what damage can be done to the engine in such a situation? tell me please
Yes, a malfunctioning Positive Crankcase Ventilation (PCV) valve can potentially contribute to an oil leak in your vehicle. The PCV valve plays a crucial role in maintaining proper crankcase ventilation and preventing the buildup of pressure inside the engine. Excessive pressure in the crankcase can force oil to leak through gaskets, seals, and other vulnerable points in the engine. Additionally, if the PCV valve is stuck in the closed position, it may cause a vacuum in the crankcase, leading to oil leaks as well. An oil leak may also cause smell in your car cabin. Over the long term, this can contribute to decreased engine performance, reduced fuel efficiency, and increased risk of costly repairs.
I have a 2022 Silverado with auto start. This only happens when I start it up and doesn't continue. When I start it up it blows black smoke. What say you?
Car usually emit black smoke due to poor combustion of the air-fuel mixture. In this video, I have properly explained all the possible causes of black smoke from exhaust czcams.com/video/oU7GNfWNCRY/video.html
OMG, my car is exhibiting EVERY SYMPTOM IN THIS VIDEO, calling the mechanic ASAP Monday morning!!!
how it go? u fix it?
Can this also lead to engine power reduced in GMC terrain? My GMC terrain has the engine check light on and when I move for a long time and i stop and move again the engine power reduced indicator comes on the vehicle slows down and comes to a complete stop after a few meters. Is there any ideas why this is happening?
Yes it can reduce
Get your codes check to narrow down possible problems. Most auto parts stores will do this for you for free. I’d do it ASAP
Absolutely
Would this have anything to do with oil disappear. It don’t burn it and I don’t see any leaks anywhere
Yes
I’m having the same problem I think it’s the pvc value
I'd like to know too.. i just changed mine because inside pcv hose there was literally very much oil
Same issue , trying this soon , crazy low on oil after 1,300 miles but have no smoke , or no miss fire , or no noticeable leaks
Internal oil leaking,..( leaking from valve stem seal and Piston oil Ring)
Ontop of oil disappearing no leaks or smoke out the back, would the inside of my car smell like exhaust when i use the ac or heater? I checked exhaust manifold and followed the exhaust system and no leaks.
Given the combination of symptoms, it is crucial to address both the oil consumption and the exhaust smell promptly. The exhaust smell inside the cabin is particularly concerning due to the potential for harmful fumes.
1) Check for Internal Oil Leaks:
i) Compression Test: Perform a compression test to check for worn piston rings or cylinder walls.
ii) PCV Valve: Inspect and replace the PCV valve if necessary.
Inspect the Exhaust System:
iii) Visual Inspection: Perform a thorough visual inspection of the exhaust manifold, gaskets, and the entire exhaust system for any signs of leaks.
iv) Smoke Test: A smoke test can help identify small leaks in the exhaust system that might not be visible.
2) Examine the HVAC System:
i) Inspect Blower Motor and Housing: Ensure the blower motor and its housing are free from damage and properly sealed.
ii) Cabin Air Filter: Replace the cabin air filter if it’s dirty or improperly installed.
Facing rough idle, idle rpm fluctuates, misfires at idle and below 2.5k rpm, mild white smoke coming from exhaust and some oil/vapour drops emanating kerosene kind of nauseating odour. What could it be? Plugs 3 and 4 had mild oil traces post cleaning there's no misfire logged. Oil was topped slightly over max.
EA888.2 k04 setup 1.8 tsi. Running a vika pcv.
Issue surfaced after some experimental geek flushed the entire oil and added additive to fresh motul xcess 100 5w40
Sounds like fuel injectors going bad or getting clogged
Going through the same thing except plugs 3 and 4 haven’t checked those im thinking it a pcv valve considering there’s a boost leak as well. Going to the shop tomorrow
@@gavyndavis290 In my case it was the injector 3 missing it's seal and O ring. I suspect the technician who removed the intake manifold for cleaning had the injectors cleaned and missed checking the seal. The pressure on the third injector was so high, the missing seal caused the O ring to burn which explains the kerosene smell.
Swapped the injector with a replacement one and issue resolved. Ran a comp check and it was back to 180 PSI. Dodged a big time bullet. Garages were pestering me for a rebuild :(
I've changed the PCV as well. Oil consumption has subsided. VIKA/FEBI PCV's seems to have an issue holding the oil traces and end up dumping excess oil onto the turbo pipe. Make sure to only put an original VW PCV if the issue is isolated to it.
@@an5ish will do and yeah a lot of mechanics and etc want a rebuild and that gets too expensive I’ve realized with Volkswagens at about 150,000 this always happens but usually once u catch it and fix it problem goes away but I have misfires , rough idle , fuel mileage decreased , pretty sure oil decreased and it sounds like it’s cammed so has to most likely be a pcv causing it
Last week, My car was overheat.. & the radiator was crack damage, then after i replaced it .. then i try to drive long way road.. after 55mins later again the temp was so high.. overheating .. the waterpump i check maybe okay.. because when i refill with the water on the radiator it keep swallow the water goes down.. but theres no leak at all .. and its like a pressure .. then is that normal if black oil but after i touch it with my fingger its black liquid .. oil that mixxing with water ? that comes through my exaust? but my engine & radiator colent is clean so far not mixing at all.. & no smoke at all on my exaust but theres a black oil liquid at the exaust what could be the problem? on mazda 2 hatchback demio 2005
Im no mechanic but based on other videos ive seen, if your engine had history of overheating, chances are your piston,head gasket , etc are damage as well. Pls do reply if theres an update, just for curiousity. Thanks
Im seeing a lot of white smoke and oil type of liquid coming out the exhaust. Can this be part of the problem?
White smoke usually means that coolant is being burned in the engine, which means that something is drastically wrong. The most common cause of this is a blown head gasket.
My pcv hose got a big hole in it. Can that cause a severe oil leak after the car been running?
A big hole in the PCV hose can lead to several issues, but it is unlikely to cause a severe oil leak directly.
The PCV system primarily deals with air and gas flow rather than oil. However, if there is excessive pressure buildup in the crankcase due to a malfunctioning PCV system, it can potentially cause oil leaks from other seals or gaskets in the engine. Excessive pressure can force oil past seals and gaskets, leading to leaks.
If you have noticed a significant oil leak after the PCV hose developed a hole, it is possible that the increased pressure caused oil to escape from other areas. It is recommended to inspect the engine thoroughly to identify the exact source of the oil leak and repair it accordingly.
@MechanicalBoost good news is it was just ac water dripping on an old stain on the concrete.
Quick question... I broke a bolt to the exhaust vvt solenoid, so nothing is holding it in place, but it's fit pretty firm. You think it's safe to drive like that?
@@Justin-uv4jiif it’s got oil pressure probably not. Would pop out over time
Would this cause a code p0730 to pop up incorrect gear Ratio. My 2005 Chrysler 300c rpm Fluctuate up and down when driving 25 to 40 mph that I noticed. Car has 180,000 miles
p0730 trouble code indicate an issue with the incorrect gear ratio detected in an automatic transmission. This code is usually not directly related to PCV valve
Would bad pvc valve cause 02 sensor reading
Yes, A bad PCV valve can potentially affect the readings of the O2 (oxygen) sensor in your vehicle, although the relationship between the two components is not direct.
Yes it will cause the oil to be gradually burned
I have this problem. Im trying to locate pcv valve i have an f150 2009 4.6 triton. Thanks
The PCV valve is located on the right side (2009 and earlier models and 2015 and later models) or the left side (2010 through 2014 models) valve cover.
Im getting blow by smoke from under the oil cap,what could that be from? Worn out gaskets?
I would say piston rings
What is a anderpanu?
Would the pcv valve be the cause of white smoke coming out of airfilter?
A bad PCV valve is unlikely to be the direct cause of white smoke coming out of the air filter. The PCV valve is responsible for regulating the flow of blow-by gases from the engine's crankcase to the intake manifold, where they can be burned in the combustion process.
White smoke usually indicates the presence of coolant or water vapor in the combustion chambers. Common causes of white smoke are coolant leaks, Condensation, Faulty Fuel Injection, or Incorrect Fuel Mixture
@@MechanicalBoosthey brother question i’m having white smoke come out the car but i fixed the engine heads and all parts are new could it be the pcv valve? i only see the white smoke when i accelerate
@@BigGoon600 White smoke from the exhaust can be indicative of several issues, even after replacing the engine heads and other parts. Here are a few possibilities, including the PCV valve:
1) Bad PCV Valve
2) Coolant Leak
3) Residual Coolant
4) Condensation
5) Oil Leak
6) Incorrect Assembly
@@MechanicalBoost i appreciate your reply man thank you i am going to change the pcv valve and see if that does it 🙏🙏
Does bad pcv valve cause low oil pressure?
Yes, a malfunctioning PCV (Positive Crankcase Ventilation) valve can contribute to low oil pressure by disrupting the engine's ability to regulate crankcase pressure effectively. This can lead to oil leaks, reduced oil flow, and ultimately, lower oil pressure.
Will this cause high oil pressure if bad??
Yes a faulty PCV valve may also cause high oil pressure but it is very rare
Mine was rocker cover. Hissing from coil pack area. Slight air hole, was hissing. I had slight white smoke when on incline. Coolant pressure rise.
New rocker cover, gasket... it stopped.
Good Job
nissan sentra buy the oem pcv is different from the after market.
Can this cause low compression in a cylinder ?
A malfunctioning Positive Crankcase Ventilation (PCV) valve is unlikely to directly cause low compression in an engine cylinder. The PCV valve is primarily responsible for controlling and regulating the flow of blow-by gases from the crankcase back into the intake manifold to be burned in the combustion process.
I have a rough idle and engine dies at times, full consumption has been high could This be but I have no codes
Sometime, your car start to produce different symptoms without any trouble code. In such case, you need to properly inspect all the engine parts
The purge valve can cause that for sure. Is it hard to start when you refuel?
Would it make my truck rattle a little when hot?
Yeah it can
My civic is burning too much fuel, changed both lamda sensors and it still didnt solve the issue. Hopefully this will do it, it all makes sense since its burning quite some oil.
If your Honda Civic is burning excessive fuel even after replacing both lambda sensors, there could be several other potential causes for the issue such as air filter, fuel filter, fuel injectors, fuel lines, or fuel pressure regulators or others.
Thanks for the reply. You were right that it wasnt root cause. Aftet replacing it trims got a bit lower, but engine started reving up and down indefnitely. It could be that it wasnt airtght or smth, but even after plugging the pcv hose going to intake didnt solve high trims.
is loss of power one of the symptoms ?
Yes
Will this result to limp mode as well?
Yes
Zero crank case pressure?
When by design they'll run .2-.4inH2O crankcase vac. This is about equal to you sitting at rest and drawing a breath, almost a neutral vac/pressure condition.
That's a problem to me.
So... what is EGR then?
The Exhaust Gas Recirculation (EGR) valve is an important component in an internal combustion engine, and its primary function is to reduce the emissions of nitrogen oxides (NOx) by recirculating a portion of the engine's exhaust gases back into the intake manifold.
Please i noticed my car is misfiring, white smoke from the exhaust, and shorten of engine oil. Imagine 5ltr of engine oil cant take me for 1week
Experiencing misfiring, white smoke from the exhaust, and a sudden decrease in engine oil levels can be concerning issues, often indicating underlying problems with your vehicle. The issue may be a Leaking Head Gasket, Coolant Leak, Failed Piston Rings, Cylinder Head or Engine Block Cracks, clogged PCV valve or breather hose. It is recommended to have your vehicle inspected by a qualified mechanic as soon as possible.
Could bad pcv valve cause slight knocking like sound
Also one had oil crusted on it and other had oil in it
Yes, a malfunctioning PCV valve can potentially cause engine knocking-like sounds. The PCV valve regulates the flow of gases between the crankcase and the intake manifold. If the valve is stuck open or closed, it can lead to various issues, including increased pressure within the crankcase or improper ventilation.
Increased crankcase pressure can result in oil leaks, loss of power, and even engine knocking noises. Knocking noises occur when the air-fuel mixture ignites prematurely in the combustion chamber, causing pressure waves that can sound like knocking or pinging.
Arigato 🙂
where the beginning of pcv velve where i see hose connecting i take hose off i see little oil
What trouble code number is caused by a bad pvc valve. So we know what to look for.
Here are some common trouble codes that may be triggered by problems related to the PCV system: P0171, P0172, P0505, P0506, P0441, P0446, P0130, P0141
Computer generated ... when did you even see a car with a 5-speed stick transmission? I had one of the last ones in 1989 ...in a Toyota Camry!
you realize a lot of people still drive really old cars, right? like you aren’t the only person on the planet.
I had one in 2010. Another one in 2012. You can still buy some cars with manual transmissions
I have two K1500 farm pickups w/5 speed and a 5 speed 95 VW Passat. Love 'em all.@@tehMaloWalo
In the UK 85% of cars are manual lol
many many cars are 5 speed manual stick. Because, well, other countries exist you know..
A very helpful tip is to place 2 ball bearings into spark plug hole. Then fit the spark plug. This will make the engine run smoother
My engine is running really rough I’m going to give your suggestion a try. Thanks for the tip!
@tbone6354 Now my car is making a clunking sound. Do you know why? I did what you said. Put ball bearings in my spark plug holes. Ran smooth for like 2 seconds. Than I started hearing these new noises. Now what do I do?
dafuq is with these random videos.... you could have put a list...
Jgb .....
Shows a woman during a noisy engine that grunts comment.
😂😂😂 interesting
drivel
My car had all the symptoms thought my trans was going on thanks for the video you are a master 🫡
So it's better to drive it harder and faster?