pontiac Workshop Repair Guides

Pontiac Workshop Service and Repair Manuals

Fuel - Light Hammering or Rattle Noise|Page 2507 > < Fuel Supply/Return/or Emission Pipe Service|Page 2502
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Fuel Supply Line: Technical Service Bulletins
Fuel - Light Hammering or Rattle Noise

Bulletin Number: 92-6-69
Reference Number: 336303
Publish Date: 6/93

Subject:
LIGHT HAMMER/RATTLE NOISE (REPLACE FUEL FEED HOSE ASSEMBLY)

Models Affected:
1989-92 FIREBIRD MODELS WITH 5.OL
OR 5.7L V-8 ENGINE (RPO'S LB9, L98)

CONDITION:

Some 1989-92 Firebird models with 5.0L V-8 engines (RPO LB9) or 5.7L V-8 engines (RPO L98) may exhibit a light hammering/rattle type noise
audible in the vehicle passenger compartment.

CAUSE:

Pressure pulsations in the fuel system, generated by fuel injector operation, causing hydraulic hammering in chassis fuel pipes.

CORRECTION:

Fuel - Light Hammering or Rattle Noise|Page 2507 > < Fuel Supply/Return/or Emission Pipe Service|Page 2502