What is the purpose of the IAC valve in controlling engine idle speed for the Honda Prelude?

The Engine Control Module (ECM) adjusts the engine idle speed using the Idle Control Valve (ICV). As an intake throttle plate bypass, this valve allows a steady idling speed irrespective of the loads that the engine experiences. Minimum idle speed is set at the factory and should not be adjusted. Confirm outlet mounting, hoses, and connections before testing an Idle Control Valve. Start the motor and then unplug an Idle Control Valve while still on and it will reduce its speed down. If there are any idle problems afterwards just make sure you check them in the wiring harness or vacuum leaks. To replace an Idle Control Valve, one must remove the battery, take off the old valve with seals, clean surfaces, install new ones with new seals, and connect everything back up again.

Genuine Honda Prelude Idle Control Valve

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22 Idle Control Valves found

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Honda Prelude Valve Assembly, Fast Idle (Af41D)
Part Number: 16500-P0A-A01
$179.24 MSRP: $255.34
You Save: $76.10 (30%)
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Product Specifications
- Other Name: Fast Idle Solenoid
- Replaces: 16500-P0A-A00
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1997-2001 Honda Prelude | 2 Door Base, 2 Door TYPESH | KA 5MT, KL 5MT
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Honda Prelude Valve Assembly, Fast Idle (Af15A)
Part Number: 16500-PT2-900
$133.87 MSRP: $190.70
You Save: $56.83 (30%)
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Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1992-1996 Honda Prelude | 2 Door S | KA 4AT, KL 4AT
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Honda Prelude Valve Assembly, Fast Idle (Af42D)
Part Number: 16500-P0A-A51
$219.23 MSRP: $312.29
You Save: $93.06 (30%)
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Product Specifications
- Other Name: Fast Idle Solenoid
- Replaces: 16500-P75-900
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1997-2001 Honda Prelude | 2 Door Base | KA 4AT, KL 4AT
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Honda Prelude Valve Assy., Idle Up Solenoid
Part Number: 36164-PJ0-671
$150.08 MSRP: $247.98
You Save: $97.90 (40%)
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1985-1987 Honda Prelude | 2 Door SI | KA 4AT, KL 4AT
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Honda Prelude Valve Assembly, Fast Idle (Af15C)
Part Number: 16500-PT2-000
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1992-1996 Honda Prelude | 2 Door S | KA 5MT, KL 5MT
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Honda Prelude Valve Assembly, Fast Idle Solenoid
Part Number: 36140-PJ0-661
Product Specifications
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1985-1987 Honda Prelude | 2 Door SI | KA 5MT, KL 5MT
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Honda Prelude Valve Assembly, Fast Idle
Part Number: 16500-PK3-A10
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1990-1991 Honda Prelude | 2 Door 2.05SI | KA 4AT, KL 4AT
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Honda Prelude Valve Assembly, Fast Idle (09B)
Part Number: 16500-PK2-671
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1989 Honda Prelude | 2 Door 2.0SI | KA 4AT, KL 4AT
View related parts
Honda Prelude Valve Assembly, Fast Idle
Part Number: 16500-PK2-A10
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1990-1991 Honda Prelude | 2 Door 2.0SI | KA 4AT, KL 4AT
View related parts
Honda Prelude Valve Assembly, Fast Idle
Part Number: 16500-PK3-A00
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1990-1991 Honda Prelude | 2 Door 2.05SI | KA 5MT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Fast Idle (Af09A)
Part Number: 16500-PK2-000
Product Specifications
- Other Name: Fast Idle Solenoid
- Replaces: 16500-PK2-005
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1991 Honda Prelude | 2 Door 2.0SI | KA 4AT, KA 5MT, KL 4AT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Fast Idle (09A)
Part Number: 16500-PK2-005
Product Specifications
- Replaced by: 16500-PK2-000
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1989 Honda Prelude | 2 Door 2.0SI | KA 4AT, KA 5MT, KL 4AT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Fast Idle
Part Number: 16500-PJ0-661
Product Specifications
- Other Name: Idle Speed Control; Idler Speed Control
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1985-1987 Honda Prelude | 2 Door SI | KA 5MT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Fast Idle
Part Number: 16500-PJ0-671
Product Specifications
- Other Name: Idle Speed Control; Idler Speed Control
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1985-1987 Honda Prelude | 2 Door SI | KA 4AT, KL 4AT
View related parts
Honda Prelude Valve Assembly, Fast Idle (Af41A)
Part Number: 16500-P13-000
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1992-1996 Honda Prelude | 2 Door SI, 2 Door Sivtec | KA 5MT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Fast Idle (Af41B)
Part Number: 16500-P13-900
Product Specifications
- Other Name: Fast Idle Solenoid
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1992-1996 Honda Prelude | 2 Door SI | KA 4AT, KL 4AT
View related parts
Honda Prelude Valve Assembly, Electronic Air Control
Part Number: 36450-PK1-003
Product Specifications
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1990 Honda Prelude | 2 Door 2.0S | KA 4AT, KA 5MT, KL 4AT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Electronic Air Control
Part Number: 36450-PK3-A02
Product Specifications
- Other Name: Idle Speed Control; Idler Speed Control
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1990-1991 Honda Prelude | 2 Door 2.05SI | KA 4AT, KA 5MT, KL 4AT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Electronic Air Control
Part Number: 36450-PK2-003
Product Specifications
- Replaced by: 36450-PK2-023
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1989 Honda Prelude | 2 Door 2.0SI | KA 4AT, KA 5MT, KL 4AT, KL 5MT
View related parts
Honda Prelude Valve Assembly, Electronic Air Control
Part Number: 36450-PK2-023
Product Specifications
- Other Name: Idle Speed Control; Idler Speed Control
- Replaces: 36450-PK2-003, 36450-PK2-013
- Warranty: This genuine part is guaranteed by Honda's factory warranty.
Fits the following Vehicles:
- 1988-1991 Honda Prelude | 2 Door 2.0SI | KA 4AT, KA 5MT, KL 4AT, KL 5MT

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About Honda Prelude Idle Control Valve

A Honda Prelude needs to be kept in good working condition in your vehicle. The online catalog we provide will get you through the ordering process safely and securely. All genuine Honda Idle Control Valves from us are shipped directly from authorized Honda Dealer. If you want search for Honda Idle Control Valve fast and easily, just come to Hondapartsnow.com to look for your parts.

Honda Prelude Idle Control Valve Parts Questions & Experts Answers

Valve Assembly, Fast Idle (Af41D)
16500-P0A-A01
Q: What is the purpose of the IAC valve in controlling engine idle speed for the Honda Prelude?
A: The Engine Control Module (ECM) adjusts the engine idle speed using the Idle Control Valve (ICV). As an intake throttle plate bypass, this valve allows a steady idling speed irrespective of the loads that the engine experiences. Minimum idle speed is set at the factory and should not be adjusted. Confirm outlet mounting, hoses, and connections before testing an Idle Control Valve. Start the motor and then unplug an Idle Control Valve while still on and it will reduce its speed down. If there are any idle problems afterwards just make sure you check them in the wiring harness or vacuum leaks. To replace an Idle Control Valve, one must remove the battery, take off the old valve with seals, clean surfaces, install new ones with new seals, and connect everything back up again.

Related Honda Prelude Parts

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