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A PCV valve stuck closed will cause rough idle, the MAP sensor (Manifold Absolute Pressure) gets confused from a conflicting signal from the MAF (Mass Air Flow) sensor because of no air entering intake from PCV. Stuck open, no. The vacuum from PCV is supposed to be measured by the MAF, as it is air going in plenum.
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How do you know when a PVC valve is bad?
A PVC valve is typically bad in a car if a car has an oil leak. Other signs of a bad valve include a collapsed hose and a sludge-like buildup.
Smoking out of valve cover breather on a ford mustang?
PVC valve is bad
How would you no idle air control valve bad?
1990 Honda accord ex how would you know if idle air control valve is bad?
Does bad spake plugs make car shake in idle and with ac on?
Yes they can. It can also be a vacuum leak, or defective idle control valve.
What can a bad PVC valve do to your 2001 Chevy silverado truck?
if clogged it can cause excessive crankcase pressure create engine oil leaks,saturate oil with combustion fumes (dilute oil) cause idle problems or buzz like crazy at idle. also it can make you fail emissions test at mv inspection
Will a bad PVC cause the idle to go up and down about 200 RPMs and stall and die at a stop light?
A faulty PCV valve can certainly cause idling problems, especially after the engine has warmed.
How do you know if your PVC valve is bad?
start the car and pull the PCV valve out of the valve cover and put your finger over the end of it and see if you feel it sucking.
What are the signs of a bad idle control valve?
whete code (Test Server)
What are the symptoms of bad intake air valve?
With a bad/burned intake valve the engine will idle rough with a skip and lose power. The cylinder in question will test low in compression. If the valve is damaged bad enough the engine will make a popping noise through the carburetor or throttle body especially during acceleration.
Why does your 1994 dodge ram van die at idle?
Could be you have a bad IAC valve
Can the egr valve affect the idle?
Yes. Carbon deposits in the EGR valve can cause it to stick open a bit and cause a rough idle. If it is bad enough, the engine will stall out when you slow to a stop.
Will a bad egr valve cause your car to idle rough or die?
It is a common suspect in contributing to rough idle. See "Related Questions" below for more about the EGR valve, from testing to replacing.
