CODE 51,55;FUEL FLOW INTERRUPT POSSIBLE MISSING CALPAK. Pontiac Sunbird 1985

For 1990-2009 cars

# CODE 51,55;FUEL FLOW INTERRUPT POSSIBLE MISSING CALPAK

#### VEHICLES AFFECTED: 1984 Pontiac 2000 Sunbird With 1.8L Turbo and Buick Skyhawk With 1.8L Turbo

When Codes 51 or 55 are indicated and fuel delivery to the engine is interrupted, the ECM should be checked for a missing Calpac. Code 52 will NOT register if the Calpac is missing. If the Calpac is in place, normal diagnostics should be used check for a malfunctioning PROM or ECM.

When servicing the ECM, both the Calpac and PROM must be transferred to the new ECM.

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