What Happens If My Power Valve Is Too Big? 4 Common Symptoms

Are you facing a problem with your car’s fuel economy and air-fuel ratio? If so, you might be using the wrong range of power valves because such type of problem arises when the size of your power valve is either too big or too small.

Now, the problems that arise from using a big power valve are very specific. Do you know what they are? Well, in this article, you will get the answer to your question, “ what happens if my power valve is too big?”

In short, your car engine will respond negatively with a bigger power valve. The bigger size of the power valve will decrease the fuel economy/ gas mileage and emit black smoke. Also, it will have poor idling and a foul spark plug. Now, if you keep continuing with the wrong range of power valves, it will damage your car engine.

Are you interested in knowing about the side effects elaborately? If so, then let us dig more into the topic.

4 Signs That Tell That The Power Valve Of Your Car Is Too Big

There are signs or symptoms that your car will show when you are using the wrong power valve. These signs are also considered the side effects of using a power valve of the wrong size, specifically the bigger power valve than needed.

Now, if your car shows the following signs or symptoms, understand that the power is too big for your car engine.

So, let’s explore them-

1. Poor Idling

The very first sign that indicates that you are using a higher power valve value than your car’s usual capacity is poor idling. If your car has rough or poor idling, you will not feel smooth while running the car.

Also, by noticing the RMP (Revolutions per minute) of your car, you can tell that your car has poor idling. In most cases, RMPs below 600 indicate a rough idle condition of your car. However, you must always measure the idling with the typical RMP range of your car.

Hence, if your car’s RMP has fallen below its typical range, the power valve is too big. In this case, changing the power valve is the only solution to this problem.

2. Poor Fuel Economy

When the power valve of your car is too big, the first thing you will notice is the reduction in fuel economy. So, if your car runs fewer miles per gallon, there is something wrong with the valve. Especially when the power valve that is used on your car’s carburetor is too big, there is a higher chance of affecting the fuel economy.

Hence, change the valve to a smaller range whenever you see lower gas mileage or fuel economy. If you see the fuel economy improved after changing the power valve, that means you now have put the correct power range.

3. Black Smoke Coming Out From The Exhaust

Another sign that your car has a bigger power valve is the emission of black smoke from your vehicle. Now, there are actually many other reasons that cause a car to emit black smoke. But using a power valve higher than the car’s requirement is one of the common reasons. So, whenever you see an emission of black smoke from the exhaust, first check the valve.

If you see that the valve is bigger than your car’s capacity, change the valve. However, sometimes it might happen that you are using the right range of valve and still facing such kind of problem. Now, this happens due to other internal problems related to car engines.

You must solve the problem as soon as possible because black smoke never brings good news. It always indicates that there is a huge problem with your car.

4. Spark Plug Residue

The spark plug getting contaminated with carbon, fuel, and oil is another sign of having a bigger power valve. Because when the power valve is higher than the usual range, it fouls the spark plug. So, this incident lets the spark plug get in touch with fuel or oil and causes problems.

Therefore, these are all the symptoms or signs of your question, “what happens if my power valve is too big?” Whenever you see these signs, your first job is to check the valve and change it if necessary.

Frequently Asked Questions (FAQs)

What size power valve should I use?

Determining the proper size of the power valve is simple. First, determine the vacuum reading number. Then, divide the number by two, and the result of the division is the correct size of the power valve of your car. For example, if your vacuum reading is 14, then the power valve range must be 7.

What does adjusting your power valve do?

If you want to add or lower the preload, you need to adjust the power valve of your car. For example, adjusting the adjustment screw of the power valve in clockwise direction will add preload. In contrast, adjusting the power valve in counter clockwise will lower the preload.

Why do you need to test a power valve?

It is essential to test a power valve to know whether it is too big/small or is blown. Also, the wrong size and a blown power valve have similar symptoms. So without testing, it is impossible to determine the exact problem. You can only test the power valve with a vacuum gauge which is mostly available in all automobile shops.

Final Words

Well, that is all about the sign or symptoms of a car that will tell you that the power valve of your car is too big. This article provided an elaborative answer to your question, what happens if my power valve is too big?” Now, if you see any of these symptoms, hopefully, you will be able to figure out that these problems arose because of having a bigger power valve.

Remember, a power valve might seem like an insignificant device as it is really a tiny device of the exhaust system. But this tiny device will cause trouble if its range is higher than the vacuum level of your car engine.

We tried our best to answer your query. Thank you for associating with us till the end of this article.

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