Intake Manifold Runner Control Stuck Open Bank 2
Bank 2 intake manifold runner control (IMRC) is stuck in open position, reducing engine performance and fuel efficiency. This affects variable intake timing on one cylinder bank.
What You Might Notice
- Reduced engine performance at low RPM
- Diminished fuel efficiency
- Engine surge or hesitation
- Check engine light illuminated
- Rough idle
Most Common Causes
- 1
Defective IMRC actuator solenoid
Bank 2 solenoid failure prevents proper runner control operation.
- 2
Wiring or connector issues
Open, shorted, or corroded connections in the solenoid control circuit prevent signal delivery.
- 3
Intake manifold runner binding
Loose or stuck runners on bank 2 prevent proper opening and closing movement.
- 4
Faulty position sensor or MAP sensor
Failed bank 2 IMRC position sensor gives incorrect feedback to engine control module.
How to Diagnose It
- 1
Check Defective IMRC actuator solenoid — Bank 2 solenoid failure prevents proper runner control operation.
- 2
Check Wiring or connector issues — Open, shorted, or corroded connections in the solenoid control circuit prevent signal delivery.
- 3
Check Intake manifold runner binding — Loose or stuck runners on bank 2 prevent proper opening and closing movement.
- 4
Check Faulty position sensor or MAP sensor — Failed bank 2 IMRC position sensor gives incorrect feedback to engine control module.
How to Fix It
- 1
Replace IMRC actuator solenoid
Remove and install new bank 2 IMRC solenoid assembly.
- 2
Inspect and repair wiring
Check control circuit wiring for damage, corrosion, or loose connections and repair as needed.
- 3
Clean or replace position sensor
Test bank 2 IMRC position sensor and replace if defective.
- 4
Inspect intake manifold runners
Remove manifold and check for binding or damage in bank 2 runner mechanism.
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