Aspire L4-81 1.3L SOHC (1994)
Auxiliary Air Valve (Idle Speed): Service and Repair
1. Disconnect the battery ground cable.
NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control
module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the adaptive strategy.
2. Drain the cooling system below the level of the Idle Air Control Bypass Air (IAC BPA) valve.
3. Mark the air and coolant hoses for ease of installation, and remove the hoses from the IAC BPA valve.
NOTE: The lower coolant line should be disconnected after the valve is separated from the upper intake manifold.
Idle Air Control Bypass Air Valve
4. Disconnect the valve electrical connector.
Idle Air Control Bypass Air Valve
5. Remove the two IAC BPA nuts and bolts.
6. Pull the valve from the upper intake manifold. Disconnect the lower coolant line from the IAC BPA valve.
7. Remove the valve and gasket. Discard the gasket.
8. To install, reverse the removal procedure. Install a new gasket, and tighten the IAC BPA nuts and bolts to 8-10 Nm (71-88 lb in).
9. Refill cooling system and check for leaks, repair if necessary.
