What are the symptoms of a broken PCV valve?
High Idle RPM/Rough Idle Because the PCV valve is controlling the air flow between the crankcase and the intake manifold, a broken PCV valve can have the same symptoms as an intake air leak which can cause the idle RPM to get too high and other strange idle behaviours like very rough idle.
How long does it take to replace a PCV valve?
Overall, if you have an older car, the PCV valves are often easy to replace and should only take around 10 minutes, while on newer cars, there could be a replacement time of over 3 hours if it’s located under the intake. Sometimes, you have to remove the intake to access the PCV valve; luckily, this is not that common.
Can a PCV valve be installed without an engine?
Some older cars with a PCV valve fitted without an electronically controlled engine will not have this symptom.
Can a bad PCV valve cause an intake leak?
Because of the issues discussed, a faulty PCV valve can have the same symptoms as an intake leak, and the air/fuel mixture can end up being wrong. Usually, your air/fuel mixture will become lean, and you can feel the same symptoms as from a lean mixture.
Where can I find the PCV valve on my 2007 Jeep Grand Cherokee?
Location of pcv valve? Where can I find the pcv valve on my 2007 Jeep Grand Cherokee with a 4.7L V-8 engine? I would really like to change it since I just purchased the vehicle and it has 67,000 miles on it. Also, what is the EGR valve? Is that something I need to change?
Where is the PCV valve on my FlexFuel?
I have an 07 4.7L V8 flexfuel. I have seen a picture somewhere on here that shows the location of my pcv valve. It is on driver side header closest to fire wall. There is a visible blue clip on it where it goes into the header. I am hoping someone has changed that with some advice. Got the new pcv valve from dealer and replaced it.
High Idle RPM/Rough Idle Because the PCV valve is controlling the air flow between the crankcase and the intake manifold, a broken PCV valve can have the same symptoms as an intake air leak which can cause the idle RPM to get too high and other strange idle behaviours like very rough idle.
Overall, if you have an older car, the PCV valves are often easy to replace and should only take around 10 minutes, while on newer cars, there could be a replacement time of over 3 hours if it’s located under the intake. Sometimes, you have to remove the intake to access the PCV valve; luckily, this is not that common.
Can a bad PCV valve cause rough acceleration?
When you have a faulty PCV valve, causing a wrong fuel mixture, you can feel that your car has rough acceleration on high and low RPMs. On most cars, you won’t feel a broken PCV valve on higher RPMs than idle, but it’s worth mentioning because it can happen depending on the valve’s design.
What are the symptoms of an idle air control valve ( IAC )?
Another symptom of a potential issue with the idle air control valve (IAC) is; an illuminated Check Engine Light. If the engine control module detects an issue with the idle air control valve circuit or signal; it will set off the Check Engine Light to notify the driver that there’s an issue.
When you have a faulty PCV valve, causing a wrong fuel mixture, you can feel that your car has rough acceleration on high and low RPMs. On most cars, you won’t feel a broken PCV valve on higher RPMs than idle, but it’s worth mentioning because it can happen depending on the valve’s design.
Because of the issues discussed, a faulty PCV valve can have the same symptoms as an intake leak, and the air/fuel mixture can end up being wrong. Usually, your air/fuel mixture will become lean, and you can feel the same symptoms as from a lean mixture.
How does a stock PCV valve work in a high performance engine?
In a stock PCV valve this is accomplished by a single channel design utilizing a restrictor cone or ball and spring to control the restrictor’s opening and closing. This design usually operates efficiently with the specific engine it was designed for. In a high performance engine application, a stock valve may operate inefficiently or not at all.