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.
Engine Controls - Revised Diagnostics Code 53, EGR
1985 Buick Century V6-231 3.8LSECTION Engine Controls - Revised Diagnostics Code 53, EGR
Bulletin 85-6E-11
Date May '85
Ref. No.. 85-243-6E
SUBJECT: REVISED EGR VACUUM CONTROL DIAGNOSTIC CHART
MODELS AFFECTED: 1985 MODELS EQUIPPED WITH 3.0L AND 3.8L CARBURETED ENGINES (VIN CODES E AND A)
The chart on the reverse side updates the EGR Vacuum Control Diagnostic Chart for Code 53 on Page 6E1-85 of the 1985 Buick Chassis Service Manual. Please make a note of this change in your copy of the service manual.
Date May '85
Ref. No.. 85-243-6E
SUBJECT: REVISED EGR VACUUM CONTROL DIAGNOSTIC CHART
MODELS AFFECTED: 1985 MODELS EQUIPPED WITH 3.0L AND 3.8L CARBURETED ENGINES (VIN CODES E AND A)
DRIVEABILITY AND EMISSIONS - CARBURETED:
The chart on the reverse side updates the EGR Vacuum Control Diagnostic Chart for Code 53 on Page 6E1-85 of the 1985 Buick Chassis Service Manual. Please make a note of this change in your copy of the service manual.
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.