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 - Updated Rough/Unstable Idle Chart
1987 Pontiac Firebird V8-350 5.7LSECTION Engine Controls - Updated Rough/Unstable Idle Chart
88pontiac10
Bulletin Number: 88-6-53
Reference Number: 816520
Publish Date: 6/88
Subject: SERVICE MANUAL UPDATE - 6E SECTION B ROUGH, UNSTABLE OR INCORRECT IDLE
Models
Affected: ALL 1981-88
SERVICE MANUAL UPDATE
When using the 6E Section B, "Symptoms for a rough, unstable, or incorrect idle", make sure to check the motor mounts for damage, grounding out on the frame, mispositioned, etc. Add this check to all Section B symptom tables under the heading "Rough, Unstable, or Incorrect Idle".
Bulletin Number: 88-6-53
Reference Number: 816520
Publish Date: 6/88
Subject: SERVICE MANUAL UPDATE - 6E SECTION B ROUGH, UNSTABLE OR INCORRECT IDLE
Models
Affected: ALL 1981-88
SERVICE MANUAL UPDATE
When using the 6E Section B, "Symptoms for a rough, unstable, or incorrect idle", make sure to check the motor mounts for damage, grounding out on the frame, mispositioned, etc. Add this check to all Section B symptom tables under the heading "Rough, Unstable, or Incorrect Idle".
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.