What are the steps involved in testing the PCV valve?
What will be an ideal response?
To test the PCV valve:
PCV valves can be located in several places. They are usually in a grommet in the valve cover or intake manifold or in a hose from the crankcase. Pull the PCV valve out of its grommet.
With the engine off, remove and shake the PCV valve. It should rattle, although the one used on some smaller engines valves will not, but still work properly.
With the engine running, cover the end of the PCV valve with your thumb or finger or pinch the line leading to it. Engine rpm should drop 50 to 80 rpm, because the slight air leak from normal PCV valve operation has been closed off.
Note: This test will not work on computer-controlled vehicles with idle speed management unless the system is disabled.
Pull the fresh-air hose from the air cleaner. With the engine idling, hold a piece of paper over the end of the hose. After 1 or 2 seconds, vacuum should build and it should remain suspended there.
You might also like to view...
Helium has been mixed with ____ to gain the combined benefits of cathode cleaning and deeper penetration, particularly for manual welding.
A. hydrogen B. argon C. nitrogen D. acetylene
Two relatively inexpensive alternatives are available for reducing potential earthquake damage at a top secret government research site. The cash flow estimates for each alternative are given below. At an interest rate of 8% per year, use the B/C ratio method to determine which one should be selected. Use a 20-year study period, and assume the damage costs would occur in the middle of the study period, that is, in year 10.
 FIGURE 1.png)
Compared to the same soil used for cropland, a forested soil would be expected to lose ________ total P to streams draining the watershed
A) about the same amount of B) less C) more
Technician A says that an engine misfire will result in low CO along with high O2 readings. Technician B says that low CO and high O2 readings could be the sign of a lean mixture. Who is right?
What will be an ideal response?