Idle Speed & Co Mixture

1991 Honda Accord DX, 4D Sedan, StandardSECTION Idle Speed & Co Mixture
IDLE SPEED SPECIFICATIONS (1)

Application RPM
Accord
All Models 550-650
After ECU Reset
No Load 700-800
Under Load 720-820
Civic
1.5L 575-675
1.6L 500-600
After ECU Reset
1.5L
No Load 700-800
Under Load 760-860
1.6L
No Load 700-800
Under Load
2WD 760-860
4WD
Manual 760-860
Automatic 780-880
CRX
1.5L PFI 450-550
1.5L TBI 575-675
1.6L PFI 500-600
After ECU Reset
1.5L PFI
No Load
California 600-700
Federal 550-650
Under Load 700-800
1.5L TBI & 1.6L PFI
No Load 700-800
Under Load 760-860
Prelude
1.6L 600-700
After ECU Reset 720-820
(1) Idle speed is set with headlights and cooling fan off and automatic transmission in Drive.
IDLE CO LEVEL

Application CO Level
All Models 0.1%
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.