Intake Manifold Runner Control Stuck Closed (Bank 2)
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power at higher RPMs
- Poor acceleration or hesitation during hard throttle
- Rough idle or engine stalling
- Decreased fuel economy
- Engine lacks top-end power
Most Likely Root Causes
- Carbon buildup causing runner valve to stick closed
- Failed intake manifold runner control actuator motor
- Damaged or binding intake manifold runner control linkage
- Faulty position sensor on runner control actuator
- Vacuum leak at intake manifold runner control system
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Component Location
The intake manifold runner control system is located on or within the intake manifold assembly, typically on Bank 2 (passenger side on most engines).
Manufacturer Notes
Some manufacturers use vacuum-actuated systems while others use electric motor-driven actuators for intake manifold runner control.
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