Secondary Air Bypass - Idle Speed Hunting or Fluctuation

89mazda06

Category Applicable Model/s

4 1989-1990
RX-7 Turbo
Subject IDLE SPEED HUNTING OR FLUCTUATION

Bulletin No. 062/89
Issued 9/27/89
Revised




DESCRIPTION

Idle hunting sometimes occurs after cold start. This condition is likely to occur when the coolant temperature is approximately 59~ -97~F (15~ -37~C).

If you encounter a customer complaining about idle hunting on a 1989-1990 RX-7 Turbo, you are requested to repair the problem according to the repair procedure in this bulletin.



REPAIR PROCEDURE

1. Remove the air hose from the air bypass valve.

2. Attach the orifice onto the air bypass valve where the air hose was removed as illustrated below.

NOTE:
If the air hose is removed after the orifice is installed, the orifice will be left in the air hose. Remove the orifice from die air hose and install it as described in step 2.



VIN OF PRODUCTION CHANGE

To prevent idle speed from hunting, an orifice has been inserted into the air bypass valve.

JM1FC3*2*L0800164 July, 1989
PARTS INFORMATION


PART NO. DESCRIPTION QTY

N370 13 986 Orifice 1


WARRANTY INFORMATION

Customer Comment Code: 1J
Damage Code: 99
Part No. of Main Cause: N370 13 986
Operation No: F0114XRX
Labor Hour: 0.3 Hr.