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Chevy Truck Losing Power When Accelerating : [ Reasons & Fix ]

Chevy Truck Losing Power When Accelerating : [ Reasons & Fix ]

Being a Chevy truck owner, you might encounter frustrating situations while overtaking or accumulating speed. Even though Chevrolet continues to be one of the most dependable automobile makers, these trucks tend to lose power while accelerating.

So, we have explained the reasons leading to this lack of acceleration. After all, Chevy trucks are machines and they undergo technical glitches.

When you try to speed up, the engine of the Chevy truck needs to respond to the gas pedal input properly. However, when this doesn’t happen, you would feel the lack of acceleration. So, it’s time to find the underlying factors, so that you can fix the issue with minimal expenses.

Why does Chevy truck losing power when accelerating?

Some of the key reasons for the lack of acceleration and power in your Chevy truck include problems in the fuel pump, clogs in the air or fuel filter, and low compression in the engine.

To ensure the proper acceleration of the truck, the throttle needs to have a proper connection with the intake manifold. This component regulates the volume of air that can get into the engine.

The fuel mixes with the air when the engine pulls it in. The pistons work in sync, and a spark leads to the ignition of the mixture. Some of it rotates the crankshaft, while the others compress the mixture of fuel and air.

So, the more pressure you exert on the throttle, the more air the engine would receive. The ratio between air and fuel remains constant during each ignition. Since the spinning rate is faster, the movement of the crankshaft is several times per minute, leading to a higher revolution.

Through this procedure, the main role of the truck’s engine keeps operating and then accelerates. Besides, the operation involves the overall engine system.

So, if you find that your Chevy truck is losing power and acceleration, the issue might lie in the following aspects.

1. Malfunctioning fuel pump

The fuel pump needs to transfer the right amount of fuel and ensure appropriate pressure in the system. Now, in case you have a malfunctioning fuel pump, the engine of your Chevy truck would lose power abruptly, leading to poor performance. Besides, in the case of engine clogs, the gasoline throughput decreases. This leads to issues in the power unit.

The fuel pump might also sustain damage as a result of wear and tear. Besides, fuel gasses can contaminate these pumps and damage them. The fuel pump might also sustain damage if you happen to run the tank very low, or the filters get clogged.

These symptoms point to a possible failure of the fuel pump.

  • The Chevy truck’s engine refuses to start, or you encounter problems while starting it.
  • Misfiring fuel pump.
  • Surging of the truck when you drive.
  • You feel the dearth of power in the engine of the Chevy truck.

2. Problematic fuel injector

The fuel injector is responsible for spraying gas into the engine of the truck. This is where the combustion takes place.

In case your fuel injector has sustained damage, the engine would not get enough fuel to make it work properly. Under such situations, you would come across symptoms demonstrating failure issues with the fuel injector.

In case you have a problematic fuel injector, you might experience rough idling. The cylinders might misfire, and the Chevy truck would lack acceleration and power. Besides, you might encounter difficulties in starting the engine. Moreover, it would lead to higher fuel consumption, leading to a compromise in the truck’s mileage.

3. Failure of the oxygen sensor

The function of the Chevy truck’s oxygen sensor is to gauge how much exhaust the vehicle emits into the environment.

Accordingly, it determines whether the truck is in need of more oxygen to optimize its performance. In case the oxygen sensor in your Chevy truck fails to work properly, the data readings would be incorrect.

Moreover, wrong data readings would affect the ECM. It would not be able to make out the right ratio of fuel. As a result of this issue, the truck would continue to lose its power. As a result, you would find it increasingly challenging to drive.

Some of the symptoms of the failure of the oxygen sensor include check engine light, rough idling, more fuel consumption, misfiring of the engine, and low power and acceleration.

4. Low engine compression

The engine of your Chevrolet truck can deliver its optimal performance when the compression of the cylinder is adequate during combustion. In case the compression is low, you would notice a lack of acceleration power in the truck.

You would encounter difficulties in gathering speed on the road. At the same time, the engine would trouble you while you try to start it. The overall performance of your Chevy truck would deteriorate, and you would notice frequent engine misfires.

5. Problems with fuel filters

You will find the fuel filters in your Chevy truck between the injectors and the fuel pump. It is responsible to remove impurities from the engine fuel by filtering it.

This way, it prevents them from damaging the engine. In case the fuel filters malfunction or become dirty or clogged, it can lead to acceleration issues. The contaminants in the fuel would get into the engine, leading to other issues as well.

In case the problem lies with the fuel filters, you would notice the truck stopping all of a sudden while you drive.

Besides, drivers would experience rough idling and difficulty in starting the engine. The general performance of the truck would be poor due to the lack of power and acceleration.

6. Clogs in the air filters

As a Chevy truck owner, take care of the air filters, which might also develop clogs. When this happens, it leads to damage to the engine. To make sure that your Chevy truck performs well continually, you need to monitor the conditions of these air filters constantly.

Before the air and engine oil mix, the former needs to get into the combustion chamber of the truck’s engine. Besides, it needs to get through an air filter when it tries to reach the combustion chamber.

The process involves a mechanism that does away with all the contaminants and impurities present in the air. In case the contaminated air makes its way into the truck’s engine, it can lead to severe problems.

Under these conditions, you would experience low power in the engine and slow acceleration. On inspecting the air filter, you would find it in a filthy condition. In the combustion chamber, the ratio between the fuel and air would be inappropriate. Also, the exhaust pipe would emit very dark smoke.

How to fix Chevy truck losing power when accelerating

1. Changing the bad fuel pump

Getting your truck’s fuel pump might be a costly expense. You would need around $90 for the replacement. Besides, you need to shell out an additional cost for labor in case you don’t replace it yourself.

You might also get the oil filters replaced at the recommended interval to keep the system properly functional. Inspect the fuel pressure from time to time to know whether the fuel is in good condition.

The oil filters are small and cylindrical in shape, and you would find them in a metal box. Since it is transparent, you would be able to check its condition at any time. Replacing the oil filters would involve lower expenses, so it makes sense to change these parts at the right time.

2. Resolving injection failure issues

If it is a failed injector that bothers you, make sure to get the clogged fuel injector cleaned. You would need a fuel injector cleaner to carry out the task.

However, if the issue is severe, simply cleaning the component wouldn’t be enough. So, you need to get the fuel injector replaced. Be prepared to shell out anything between $100 and $300 to get a new injector.

3. Fixing your truck’s oxygen sensor

In case your Chevy truck has been lacking power and acceleration due to a problem in the oxygen sensor, repairing it would be expensive. Generally, replacing the sensor costs around $100.

Besides, it might be challenging to replace some of these components due to their positions. Generally, Chevy truck owners need to hire professional hands to address this issue.

4. Resolving low cylinder compression problems

In case there are holes in the pistons, you might encounter problems like low engine compression. Besides, these issues arise if there are any leaking valves, damaged camshaft, or non-functional head gaskets. So, it’s imperative to get the issue diagnosed and sort it out.

Carrying out a professional compression test might help you in this case. However, in the first place, you need to thoroughly diagnose the engine of your Chevy truck so that you eliminate the chances of guesswork.

5. Replacing the fuel filter

Replacing the fuel filter of your Chevrolet truck would cost you around $10. So, you can get this component replaced easily. Make sure to periodically replace the filters to ensure that the engine remains in proper functional conditions.

6. Cleaning or replacing the air filter

While you can get a clogged air filter cleaned at times, it won’t always be possible. However, air filters come relatively cheap, and you can get one replaced for $15 to $25.


The lack of acceleration and power in your Chevrolet truck would be a pressing issue. So, you wouldn’t want to delay the fix as it would affect your drive quality.

A quick diagnosis will help you resolve the issue. Also, we have recommended some handy solutions that you can try without calling in an expert. Allowing the problem to aggravate would simply mount your expenses in the long run.

To ensure that your Chevy truck remains in proper functional condition, follow up on the recommended maintenance schedule. This way, you can keep the common acceleration and lack of power issues at bay.