1. WARM UP AND STOP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TACHOMETER (See page IG-17)
3. CONNECT VACUUM GAUGE
Using a 3-way connector, connect the vacuum gauge to the hose between the VSV and actuator.
4. INSPECT T-VIS OPERATION
(a) Check that the vacuum gauge indicates vacuum at idling.
(b) Check that the vacuum gauge indicates zero at 4,200 rpm or more.
HINT: If regular unleaded gasoline is used, the vacuum gauge also indicates zero below 4,200 rpm.
2,500 rpm 120 seconds
Was this article helpful?