Engine Intake Valve

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Engine Intake Valve
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There are two main reasons your vehicle may begin stalling: insufficient fuel or too much air. However, narrowing down the culprits causing either of these two things requires a bit of investigative work. With that in mind, this article will provide a short list of seven factors that can potentially contribute to a stalling problem. If your car's engine suddenly dies - either right after starting or while on the road - one of the following reasons is likely to blame.

Coolant Sensor Is Malfunctioning

Your car's powertrain control module (PCM) regulates the amount of fuel delivered to the engine. It relies partly upon the coolant sensor to determine the right amount. If the sensor is malfunctioning and sends the wrong signal, the PCM will make the air-fuel mixture too rich or too lean.

For example, if the sensor tells the PCM that the engine is too cold, the computer will send too much fuel to the combustion chambers. If the sensor says the engine is too hot, the computer will lean out the mixture, causing stalling.

Spark Plugs Are Fouled

When a cylinder's spark plug becomes corroded or worn down, it becomes less capable of generating a reliable spark. That creates a misfire. If your car is idling, the misfire can cause a stall. This usually occurs when people neglect to replace their plugs before they become fouled.

Excessive Load On The Charging System

Few people recognize their vehicle's charging system as a possible factor in causing a stall. If your battery is severely depleted, your car's alternator might be forced to work harder. That, in turn, can place a greater load throughout the charging system and on your engine. If this results in a low idle, your vehicle might stall while you're stopped at a traffic light.

Contaminated Gasoline

Thankfully, this happens rarely. There have been situations during which a gas station's fuel inventory somehow becomes contaminated with water. Gasoline is specifically formulated to burn efficiently during the internal combustion process. If it becomes contaminated by any substance (including, but not limited to, water), it might not burn in the combustion chamber. That can cause stalling.

Vacuum Leaks In The Engine

Vacuum leaks can cause a number of problems, including a fast or rough idle, misfiring when you accelerate, and of course, stalling. The leaks normally develop in hoses that deteriorate over tens of thousands of miles. They can also form near the intake manifold gasket and exhaust gas recirculation (EGR) valve.

Bad Airflow Sensor

Your car's mass airflow sensor measures the amount of incoming air by using an electrical current. This component can slowly become contaminated with debris and dirt. This hampers its ability to accurately measure airflow, which can influence the air-fuel mixture that ends up in the combustion chambers. As mentioned earlier, if the mixture is too lean, your vehicle might stall.

Engine Compression Leaks

Your engine's combustion chambers need sufficient compression in order to ignite the air-fuel mixture with enough force to operate effectively. If there are leaks, the lack of sufficient compression can cause stalling. This occurs when the intake or exhaust valves become less able to close securely, or the pistons inside the chambers become worn. Unfortunately, resolving either problem is usually expensive.

A stalling engine is always inconvenient, and often costly to fix. The first step is to diagnose the root cause. Unless you have access to the necessary tools, this is best left to a trained mechanic. Once the offending component (assuming it's not a hose or bad gas) has been identified, it usually needs to be replaced.

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Things to Know About Cold Air Intake Systems

One of the simplest ways for any car enthusiast to get more power and better gas mileage out of his or her ride is to install a cold air intake system. Your intake system is the starting point of all modifications. Allowing your engine to take in air more efficiently produces extra power and performance. A cold air intake is designed to reduce the temperature of air entering a vehicle to maximize the engine’s power. The result of the colder air is a vehicle that performs better, saves on fuel, and sounds better. Additionally, a cold air intake will improve the look of a vehicle's engine bay, by adding color or the chrome look. Plus, installing a cold air intake is not a difficult job at all for the novice do-it-yourselfer.

 

All cold air intakes operate on the principle of increasing the amount of oxygen available for combution with fuel. Cold air intakes typically do this by drawing air from a location in the car where colder air can be brought into the engine. This is usually within the bumper somewhere or sometimes even closer to the front of the car. The reason for cold air is simple. Colder air is denser than warmer air and will thus expand more when it is heated up. This causes a greater combustion in your engine resulting in more power and less fuel to burn. Almost all aftermarket intakes typically have larger piping and this also helps the flow of air into your engine. Intake systems come in many different styles and can be constructed from plastic, metal, rubber or composite materials. Due to the limited time air actually remains inside the intake tubing, the materials often do not impact a kit's ability to deliver cool air. After the intake is installed, regular driving noise becomes a lot louder, and one can expect to hear a whistle during normal driving, from the sound of the air being forced into the engine. So regardless of what type of intake you pick you should be getting better flow of air to your engine.

 

There are various kinds of Cold Air Intake systems available in the markets. Typically the main three air Ram Kits, Short Ram Kits, and Long Ram Kits. Long ram air intakes create more horsepower and better gas mileage by enhancing the efficiency by eliminating the limiting stock air boxes and reinstating them with bent tubes that allow smooth flow. As a result, the amount of air going into the engine as well as its velocity is increased. The air that goes inside the engine is much cooler. However, these kits sometimes will have the input tubing low to the ground where the colder air is, but also where rain and standing water may be causing hydrolocking. Hydrolocking occurs when any liquid is present in the engine's cylinder on the intake stroke and, due to the incompressibility of the liquid, makes the compression stroke impossible. You may want to check in to an air bypass valve. An air bypass valve is a filtered spacer that is positioned more into the engine bay, between two connected pieces of the cold air intake assembly. This prevents hydro-locking by providing an alternate route for air to come in, thus eliminating the vacuum that causes water to be sucked in from a puddle. Most of these kits are pretty water tight, but be careful if you drive though a lot of deep standing water.

 

Short Ram Air intakes are similar to Long Ram intakes. The only difference lies in the short tubing. These typically will stay in the engine bay, and may lead to the grill. Although, many people say that these are not as efficient as the Long Ram intakes because they are still bringing in the warmer air from the engine bay itself. This may be partially offset by an increase in the volume of air entering the engine. To counter intake heat problems, many short ram intakes include some form of heat shield. They also will argue that the Short Ram Intakes offer benefits over the Long Ram Intakes such as better MPG due to a more complete burning of fuel.  

 

Ram air intakes utilize external air to force the air into the engine typically through a part in the hood, vents, or cut outs. It uses a scoop mounted in the front lower air dam to pull in cool air, and routes the intake charge to the throttle body. The air goes inside the intake with tubes linked to the scoop. The velocity of the air going into the intake allows more air and better quality air to get into the car which in turn boosts the performance of the car and MPG.

 

So how hard is it to install? This is a relatively easy do-it-yourself job. The vast majority is plug and plays so don’t worry about having to modify your engine bay any more then swapping intakes.

 

For the best selection and lowest prices, shop with a reputable dealer such as Moose Pak LLC at www.MPCustoms.com

About the Author

Komaka Wilson had been in the automotive accessory and detail business for over 15 years.

check engine light on took it in and was told to fix the intake manifold short runner valve.?

the light is off now because the dealer read the code, but im taking it back to fix the problem. it has something to do with the intake manifold short runner valve. also i don't do hardly any highway driving and i think i built up carbon. 2007 sebring 38000 miles. runs great. i know it wont pass emissions if i don't fix it. and i realize i need to drive on highway more to keep it carbon free. any ideas for me.

if your in waranty get it done asap but if it isnt then get a second opinion i hate dealers

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