911 Carrera 4 Cabriolet AWD F6-3600cc 3.6L SOHC (1990)
Air Flow Meter/Sensor: All Technical Service Bulletins
Engine - Erratic Idle, Loss of Power, or Stalling
May 15, 1990
Subject:
Engine, Inconsistent Performance
Model
Group
911 C2/911 C4
2
Part Identifier
Number
24../9750
9005
ATTENTION: Service Manager/Service Technician
This bulletin replaces Technical Bulletin Group 2, Number 9005, dated April 6, 1990.
Models Affected:
911 Carrera 2 and 911 Carrera 4, Model Years 1989 (K) and 1990 (L)
Concern:
Inconsistent acceleration, erratic idle, loss of power or engine dies.
Possible Cause:
The air flow meter wiring harness protective cover (Figure 1) contacts the engine ventilation hoses (Figure 2)
causing current flow interruptions on the plug terminals.
Vehicle Information:
The protective cover on the air flow meter wiring harness plug was discontinued from production date February
13, 1990.
VIN's 96 - LS 45 1659 Coupe 96 - LS 46 0409 Targa 96 - LS 47 1072 Cabriolet
Repair Information:
911 Carrera 2 model year 1990 and 911 Carrera 4 model years 1989 and 1990 prior to the above VIN's should
be modified when the engine is removed or when working on the air flow meter, even if no engine performance
problems are present.
Work Procedure:
1. Remove air filter housing cover and filter.