Manual Description
Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel container. In this process the air passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
On vehicles with an excessively high blow-by, the valve does not meet the requirement. A strong vacuum should be felt immediately when a finger is placed over valve inlet. These items are required by legal regulations to continuously monitor the system/ J component.
Each diagnosis may require a long period of actual driving under various conditions. Zone A refers to the range where the time, required for the diagnosis under normal conditions*, is the shortest. Actual upshift speeds will vary according to road conditions, the weather and individual driving habits.
Manual Cover
General