mazda Workshop Repair Guides

Mazda RX7 2RTR-1308cc Workshop Service and Repair Manuals

Engine - High Idle Speed or Hunting with Warm Engine|Page 2055 > < Fuel - Use of Regular Unleaded Gasoline|Page 2050
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Idle/Bypass Air Control Valve: Technical Service Bulletins
Engine - High Idle Speed or Hunting with Warm Engine

Category 4
Applicable Model/s 1984 RX-7 (13B)
Subject HIGH IDLE SPEED OR IDLE SPEED HUNTING
Bulletin No. 008/84
Issued

10/15/84

Revised
DESCRIPTION

If you encounter either of the following problems on 1984 RX-7 (13B) vehicles with the engine fully warmed, please follow the repair procedure listed
below:

1.

Engine speed hunts between approximately 1500-2000 rpm at idle.

2.

Engine speed stays approximately 1200-1500 rpm at idle.

Throttle Body

REPAIR PROCEDURE

1.

Throttle Body.

Rotate the secondary throttle valve lever counter-clockwise by hand as shown while the idle speed is high or hunting.

If this procedure corrects the problem, the high idle is due to sticking of the secondary throttle valve. Replace the throttle chamber (N304 20
500B) in this case.

If this procedure does not correct the problem, go to Step 2.

Vent Solenoid Valve

2.

Vent Solenoid Valve.

Engine - High Idle Speed or Hunting with Warm Engine|Page 2055 > < Fuel - Use of Regular Unleaded Gasoline|Page 2050