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.
1993 Cadillac Eldorado V8-300 4.9LFACTORY OEM SERVICE PROCEDURE
Recall - MEM-CAL/PROM Update: Overview
CADILLAC
95-C-72
Issued: 08-01-96
SUBJECT:
95-C-72 - 4.9 LITER ENGINE PCM MEM-CAL/PROM REPLACEMENT
MODELS:
CERTAIN 1991-1995 CADILLAC VEHICLES EQUIPPED WITH 4.9 LITER ENGINE (RPO L26)
The Administrator of the U.S. Environmental Protection Agency (EPA) has determined that 1991-1995 model Cadillacs equipped with 4.9 liter engines may require modifications in order to comply with requirements of the Clean Air Act designed to protect the public health and welfare. GM has determined that the modifications required by EPA will help reduce emissions of carbon monoxide and hydrocarbons, which are regulated by EPA under the Clean Air Act.
In October 1991, GM implemented a change in its production of 1992 model Cadillacs equipped with 4.9 liter engines that introduced an enrichment calibration to the fueling strategy. This calibration was subsequently included in production of 1993-1995 model Cadillacs equipped with 4.9 liter engines and in service parts received by certain 1991-1992 model Cadillacs equipped with 4.9 liter engines. The United States alleges that this calibration has a detrimental effect on a vehicle's emission control system and that this calibration was not adequately reported to the EPA.
General Motors has agreed to modify the fueling strategy for these vehicles in a way that reduces the emission of air pollutants from the vehicles without compromising driveability. All vehicles that were built with the fueling strategy in question or which subsequently received the strategy through a service prom are being recalled to have the calibration inspected and, if necessary, revised via the installation of a new service prom.
95-C-72
Issued: 08-01-96
SUBJECT:
95-C-72 - 4.9 LITER ENGINE PCM MEM-CAL/PROM REPLACEMENT
MODELS:
CERTAIN 1991-1995 CADILLAC VEHICLES EQUIPPED WITH 4.9 LITER ENGINE (RPO L26)
The Administrator of the U.S. Environmental Protection Agency (EPA) has determined that 1991-1995 model Cadillacs equipped with 4.9 liter engines may require modifications in order to comply with requirements of the Clean Air Act designed to protect the public health and welfare. GM has determined that the modifications required by EPA will help reduce emissions of carbon monoxide and hydrocarbons, which are regulated by EPA under the Clean Air Act.
In October 1991, GM implemented a change in its production of 1992 model Cadillacs equipped with 4.9 liter engines that introduced an enrichment calibration to the fueling strategy. This calibration was subsequently included in production of 1993-1995 model Cadillacs equipped with 4.9 liter engines and in service parts received by certain 1991-1992 model Cadillacs equipped with 4.9 liter engines. The United States alleges that this calibration has a detrimental effect on a vehicle's emission control system and that this calibration was not adequately reported to the EPA.
General Motors has agreed to modify the fueling strategy for these vehicles in a way that reduces the emission of air pollutants from the vehicles without compromising driveability. All vehicles that were built with the fueling strategy in question or which subsequently received the strategy through a service prom are being recalled to have the calibration inspected and, if necessary, revised via the installation of a new service prom.
Factory Service Tools
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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.
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