Showing articles & questions for topic
PCV (Positive Crankcase Ventilation)

Related articles

Symptoms of a Bad or Failing Positive Crankcase Ventilation (PCV) Valve
Common signs include excessive oil consumption, oil leaking, a contaminated filter, and reduction in overall performance.
How Long Does a Positive Crankcase Ventilation (PCV) Valve Last?
Your car’s engine operates by mixing air with fuel and then burning it. This obviously creates waste gases. Most of those gases are routed out of the engine, through...
How Long Does a PCV Valve Hose Last?
Your car’s engine requires both air and gasoline in order to operate. During the combustion process, it also creates gases. These gases contain traces of gasoline and can be re-burned by injecting...
How to Replace a Positive Crankcase Ventilation (PCV) Valve
A positive crankcase ventilation valve improves emissions in modern engines. Signs of PCV valve failure include oil leaks and poor engine performance.

Related questions

oil is entering through throttle body and smoking from exhaust after pcv valve
Hello there, a few different faults can cause oil to be burned and white smoke to be seen. The most common would be excessive blow by, an intake leak, failed PCV valve or valve stem seal. A qualified technician...
PCV hose has a hole and the guy said it will get less mileage, but is it bad?
If this engine is the 4.6, then the PCV hose gets a hole at the connection on the back of the intake in the hose. If you continue to run the vehicle with this hose broken, then you will get...
hi after month ago m bmw 325i 2002 lost oil and ia had to add 2 qurts every 500 t0 1000 mile what is the problem
Check for any obvious oil leaks. Given your mileage, a failed rear main crankshaft oil seal is the most likely the cause of this oil consumption. In addition, if any of the crankcase ventilation components (like the PCV) have become...
Oil light on
Hello. The PVC valve shouldn’t cause your oil light to come on. Most likely, the problem is that the oil is low, which would cause the light to come on. The oil pressure could be faulty, which would also cause...
Air filter housing
If you are getting oil in the air filter housing, this is from the vapor line coming from your crankcase ventilation. The oil can be from a PCV valve that is clogged and in need of replacement. The valve relieves...
Oil Pressure Issues
The PCV system on this engine is incorporated into the air filter housing and has no serviceable parts. If there is excessive oil in the air filter housing then the entire housing would need to be replaced as an assembly....
Failing PCV
There should be two sides to your PCV system. One side has the PCV valve and hose that goes to the intake and the other side should be a breather hose from a valve cover to the air cleaner or...
My car is blowing white thick smoke from tailpipe.. I just replaced the pcv with a new hose because the hose was bent .
If you are getting white thick smoke from the tail pipe, then you may be getting coolant into the cylinders. You should check to see if you are using coolant, and if you are, then you have a blown head...
Low-mileage Chevy Prisma with a quart of oil
The first thing you want to do is change the PCV valve because they often stick on this model and suck oil and burn. It could be a simple thing--five bucks. If that doesn't fix it, change your engine oil...
Ran great, died on highway, added 2 qrts, ran 5-6 miles died again
You need to check the PCV system and air filter to see if it is clogged. Remove the oil cap and start the motor after you fill the oil and see if you see smoke come out of the oil...
What would cause brand new O2 sensors to give codes 172, 173, 176, and 177, rich and lean conditions, both sides at the same time?
When it comes to across-the-board codes being set such as this, it is usually a result of something "upstream" creating the condition to set all these codes. For instance, it is rare for both O2 sensors to fail at exactly...
Truck accelerated past 35 and started sputtering
Hello there, thank you for asking about your car. The first thing that comes to mind is a secondary ignition misfire (spark plugs, wires, etc.). An ignition misfire is most noticeable under load and can be felt as a shudder...
Oil burning off 1 1/2 quarts every 200 miles
Hello there, thank you for asking about your 1994 Isuzu Pickup. For your vehicle, minimum compression is 114 PSI and all cylinders should read within 70% of each other. So, according to your results, compression is good. My guess is...
Engine revs high while idling and then drops about 1000rpms every half second or so.
My guess is that the unstable idle and unintended acceleration is due to a faulty idle air control valve (IAC). The powertrain control module (PCM) uses the idle air control valve to divert air around the throttle. Increasing the amount...
How to stop oil burning on a 2002 Toyota Corolla
The first thing you'd want to do is change the PCV valve - the positive crankcase ventilation valve. They don't cost that much. Pray that it's that. If it is, then that means that it is sticking open, and...
PCV valve hose collapses
I am guessing your PCV collapsed because it is old and weak. This will cause your PCV to collapse while it is in vacuum. I would recommend going to your local auto parts store and picking up a reinforced braided...
PCV valve and scheduled maintenance
Any time an engine has been neglected like this you should not hesitate to do any repairs to start to get the vehicle back on it's scheduled maintenance. You should have the PCV changed and change the oil and filter...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.

Ask a question