Firebird V8-305 5.0L VIN F FI (1987)
Absolute Pressure Sensor: All Technical Service Bulletins
MAF Sensor - Service Engine Soon Light/Code 36
Number
87-6 (Gasoline)-31
Date 4/87
SERVICE ENGINE SOON LIGHT - CODE 36
Subject:
(MAF SENSOR BURN-OFF FAULT)
1986-87 FIREBIRD MODELS WITH PFI ENGINES (ENGINE CODES F AND 8)
ENGINE VENT TUBE LOCATION
There have been reports of Code 36 being set on 1986-87 Firebird vehicles with 5.0L or 5.7L PFI engines because of a plugged crankcase vent tube or
faulty MAF power or burn-off relays..
Crankcase Vent Tube:
The illustration shows the engine vent tube that has been found blocked. The fresh air intake should be free from obstructions from the throttle body into
the valve rocker cover.
