Auxiliary Air Valve (Idle Speed): Service and Repair
*** UPDATED BY TSB # 258901 DATED JULY 31, 1989To replace the Auxiliary Air Regulator:
Auxiliary Air Regulator Hose:
1. Remove the black rubber intake air boot from the air flow sensor housing and the throttle valve housing.
2. Disconnect the harness connector from regulator.
3. Loosen hose clamps and remove the hoses.
4. Remove the two (2) socket-head mounting bolts and remove regulator. Note mounting position before removal.
5. Install new Auxiliary Air Regulator using the socket-head bolts, making sure regulator faces proper direction. Torque mounting bolts to:
87 in.lbs. (10 Nm)
6. Install hoses on regulator and tighten clamps.
NOTE: Check both Auxiliary Air Regulator hoses for proper operating clearance and kinking. Make sure Auxiliary Air Regulator hose near battery does not rub or contact battery tray. If hose is too close or rubbing on battery tray, additional clearance can be obtained by rotating the regulator hose.
7. If battery tray clearance is needed, loosen both hose clamps on affected hose (A) and rotate the hose 90° towards the engine (this should increase clearance) then tighten hose clamps.
8. Reconnect harness connector to regulator.
9. Reinstall rubber intake air boot.
CAUTION: Use care during intake air boot installation to avoid pushing the curved screen onto the air flow sensor plate.