RX7 2RTR- 1308cc 1.3L Turbo FI (1989)
Engine Control Module: All Technical Service Bulletins
Turbo Charger, ECU - Engine Hesitation
Bulletin No.
009/91
Issued
3/22/91
Revised
Category
F
Applicable Model/s
1989-'91 RX-7 Turbo
Subject
HESITATION ON ACCELERATION
DESCRIPTION
Some 1989-'91 RX-7 Turbo owners may complain of engine hesitation. This occurs during hard acceleration between 3,500-4,000 rpm. Enlarging the
hole in the wastegate orifice will eliminate this problem. A modified ECU installed during production since August 23, 1990 helps correct this problem.
AFFECTED OR SUBJECT VEHICLES
REPAIR PROCEDURE
1.
Verify that all emission components are functioning properly. Use a Self-Diagnosis Checker (49 H0189A1) to check for malfunction codes.
2.
Remove the orifice in the turbocharger wastegate vacuum hose circuit. Figure 1.
3.
Enlarge the orifice to 2 mm (.080 in).
NOTE:
Do not enlarge the orifice to more than 2 mm (.080 in). Doing so may lower power.
4.
Reinstall the orifice.
