Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1984T1000 L4-98 1.6LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSENGINE CONTROLS - ECM MAY CONTAIN WRONG PROM
1984 Pontiac T1000 L4-98 1.6L
Engine Controls - ECM May Contain Wrong PROM
1984 Pontiac T1000 L4-98 1.6LSECTION Engine Controls - ECM May Contain Wrong PROM
Bulletin Number: 88-6-1
Reference Number: 876501
Publish Date: 9/87
Subject: SERVICE REPLACEMENT ELECTRONIC MODULES (ECM) WITH PROM INSTALLED
Models
Affected: 1981-88 ALL MODELS
It has been brought to our attention that some service replacement electronic control modules (ECMs) have contained a PROM. A PROM should not have been included in a replacement ECM as it may not be the correct PROM for the vehicle.
When this situation is encountered, the PROM should be removed from the replacement ECM and the PROM from the vehicle should be installed.
Reference Number: 876501
Publish Date: 9/87
Subject: SERVICE REPLACEMENT ELECTRONIC MODULES (ECM) WITH PROM INSTALLED
Models
Affected: 1981-88 ALL MODELS
It has been brought to our attention that some service replacement electronic control modules (ECMs) have contained a PROM. A PROM should not have been included in a replacement ECM as it may not be the correct PROM for the vehicle.
When this situation is encountered, the PROM should be removed from the replacement ECM and the PROM from the vehicle should be installed.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.