Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161209-75876-1pfir6ejs:136:3912)
    at m.mountComponent (/tmp/execjs20161209-75876-1pfir6ejs:47:15602)
    at /tmp/execjs20161209-75876-1pfir6ejs:49:31860
    at a.r.perform (/tmp/execjs20161209-75876-1pfir6ejs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161209-75876-1pfir6ejs:49:31821)
    at r (/tmp/execjs20161209-75876-1pfir6ejs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161209-75876-1pfir6ejs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161209-75876-1pfir6ejs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161209-75876-1pfir6ejs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161209-75876-1pfir6ejs:173:8

Symptoms of a Bad or Failing Intake Manifold Runner Control

intake manifold runner control

The intake manifold runner control is an engine management component that is found on newer intake manifold designs. It is usually a motorized or vacuum actuated unit attached to the intake manifold, that controls the opening and closing of butterfly valves inside of the intake manifold runners. The unit will open and close the butterfly valves in order to provide maximum manifold pressure and flow at all engine speeds.

While an intake manifold runner is not necessary for engine operation, it does provide the engine with increased performance and efficiency, particularly at low engine speeds. When the intake manifold runner control fails, it can leave the engine without the increased performance, and in some cases even reduce performance. Usually a faulty intake manifold runner control will produce a few symptoms that can alert the driver of a potential issue.

1. Difficulty starting the engine

One of the first symptoms of a faulty intake manifold runner control is difficulty starting the engine. The intake manifold runner control is usually positioned when the vehicle is started. If the unit malfunctions, it may not position the butterfly valves correctly, which can lead to difficulty starting the engine. The engine may require more cranks than normal to start, or may require multiple turns of the key.

2. Engine misfires and decrease in power, acceleration, and fuel economy

Another symptom of a potential issue with the intake manifold runner control is engine performance issues. If the intake manifold runner control has an issue it can cause the vehicle to experience engine performance issues such as misfires, a decrease in power and acceleration, a decrease in fuel efficiency, and even stalling.

3. Check Engine Light comes on

An illuminated Check Engine Light is another symptom of a possible issue with the intake manifold runner control. If the computer detects an issue with the intake manifold runner control position, signal, or circuit, it will set off the Check Engine Light to alert the driver of the issue. The Check Engine Light can also be set off by a wide variety of other issues, so having the computer scanned for trouble codes.

While intake manifold runner control units are not found on all road going vehicles, they are becoming an increasingly common way for manufacturers to produce maximum engine performance and efficiency, particularly for smaller engines. It is also important to note that similar symptoms can also be produced by other engine performance issues, so it is recommended to have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the component manifold runner control should be replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B P2160: Vehicle Speed Sensor B Circuit Low P2161:...


Related questions

Q: Changing spark plugs on a 2007 Chevy Uplander

Yes, I take out the pack and go by feel. Do it when it's cold. Sometimes if they are really hard to get, I get them from the bottom. Jack it up and move the bottom to get to them....

Q: Intake manifold leaking

Hi. Coolant leaks from the intake manifold are common after the gasket starts to wear away requiring an intake gasket replacement. A mechanic from YourMechanic can diagnose the problem further if you desire.

Q: Intake maifold runner control is stuck open

Hello, thanks for writing in about your 2001 Mazda Miata. Due to this trouble code, the intake manifold runner control will need to be replaced. If this is not done you can cause serious damage to your car. If you...