Expo LRV AWD L4-2350cc 2.4L SOHC 16 Valve (1993)
Throttle Body: Testing and Inspection
Purge Port Vacuum Inspection
Purge Control System
1. Run engine at idle until warm [80-95°C (176-203°F)].
2. Disconnect the vacuum hose (red stripe) from the throttle body purge nipple and connect a vacuum gauge to the nipple.
3. START the engine and raise the engine speed to 2,500-3,000 rpm over a period of approximately 30 seconds while observing the vacuum gauge.
Vacuum should remain constant regardless of engine speed.
Purge Port Vacuum Test
NOTE: No vacuum at this nipple could indicate that the nipple is clogged. Clean nipple and retest vacuum.
