Caprice RWD V8-305 5.0L (1992)
Positive Crankcase Ventilation Valve: Testing and Inspection
Clean Air Intake
PCV Valve
TEST DESCRIPTION:
This test is to see if the PCV system is functioning properly.
1.
Check for a correct PCV valve and a properly mounted valve into the rubber gromment. Make sure the hose(s) and clamp(s) are tight, and in place.
2.
Start the engine, and let idle.
3.
Remove PCV valve from valve cover, and place thumb over valve.
4.
Engine speed should drop, and vacuum should be felt.
5.
If no vacuum is present, check for a clogged PCV valve, hose, or intake manifold port.
6.
Remove engine oil dipstick and install a vacuum gauge on dipstick tube.
7.
Run the engine at 1500 rpm for 30 seconds, and then take a vacuum gauge reading at that same engine speed. If vacuum is present, then system is