System Testing: Tercel
- Connect vacuum gauge to distributor main diaphragm hose. Connect a second vacuum gauge to top port of BVSV (2). Start engine and see that both gauges indicate zero vacuum when coolant is below 122°F (50°C).
- With warm engine, second vacuum gauge should show high vacuum whether throttle is open or closed. Pinch hose on VCV side of VTV with engine idling, then raise speed to 2500 RPM. Release hose and check for high vacuum at first vacuum gauge within 1-5 seconds. Return to idle, watching for smooth decrease in vacuum on first gauge.
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