One common bad PCV valve symptoms is poor fuel economy. A malfunctioning PCV valve will throw off the ratio of the air and fuel mixture, which needs to be precise for optimal combustion.This is because the vacuum on the intake side of the cylinder head will not be able to properly determi...
hanging off the side of the engine. As the vehicle went down the road, air passed over the end of the tube, creating a vacuum. The blowby gas exited the engine through this tube. An oil cap was used with a filter element in it: clean air would enter through this at the valve ...
As long as a PCV valve is functioning properly, you do not need to replace it. However, they are subject to damage due to a lot of blow-by gases traveling through them which can sludge the valve up. When the PCV valve starts to malfunction, signs or symptoms will show to alert the...
In my experience, the vast majority of flow rate problems stem from incorrectly calibrated PCV valves. Consider this: OE valve suppliers may catalog as many as 750 part numbers. Your local fast-lube joint may carry as few as a dozen or two. To further complicate matters, as Mark Sarlo, a...
t guarantee that a bad PCV valve is indeed the culprit for your issues. These codes can also be triggered by problems elsewhere. Therefore, after the code reading, do not proceed to replace the PCV valve right away but pay attention to other unusual symptoms and carry out proper ...