Chevy Truck Bogs Down When Accelerating [7 Easy Solutions]

Chevy Truck bogs down due to a defective TPS, bad injectors, bad fuel, or damaged spark plugs. Besides, there are other factors like a clogged catalytic converter or a bad distributor also responsible for this issue. 

You can’t operate the engine smoothly unless you deal with those issues and solve them. And Today’s guide will help you address those problems and let you know how to treat them. So, stay in tune with us till the end. 

chevy truck bogs down when accelerating

Chevy Truck Bogs Down When Accelerating [7 Easy Solutions]

There are many things to blame if your Chevy truck bogs down when accelerating. A faulty TPS, bad injectors, or a bad fuel filter are some culprits that cause misfires or slow acceleration. This chapter will disclose every possible suspect behind the engine bog-down issues. So, read on till the end. 

1. Problem With Throttle Position Sensor

A throttle position sensor can also be a suspect if your car hesitates. Basically, the throttle position sensor tells the computer where your foot is on the gas pedal. If it gets faulty, your car will bog down during acceleration. 

throttle position sensor

Sometimes, your car may speed up even though you don’t press the accelerator. If you go through this problem or experience it, understand there is an issue with the throttle position sensor. 


Replacing the throttle position sensor will be an easy fix for the issue. Fortunately, it’s simple to change the TPS. You can take help from the below video if you don’t know how to replace the TPS. 

2. Bad Spark Plugs

Damaged or bad spark plugs are also responsible for sluggish performance. If a spark plug gets dirty or worn out, it fails to generate sufficient sparks to ignite the air-fuel mixture. Consequently, the effectiveness of the spark plug gets lessened and your car bogs down when accelerating. 

bad spark plugs 

Besides, the spark plugs may come loose over time due to vibration and create a huge gap between them. However, worn-out spark plugs are the main culprit to making a gap, which also reduces their efficiency. 


You should replace the spark plugs if they get damaged. Now, you may ask- how can I identify that the spark plugs are at fault? Well, the following signs will help you determine a faulty spark plug: 

  • Reduce gas mileage
  • The car will hesitate during acceleration
  • Engine misfire or struggle to start
  • Poor fuel economy
  • Rough idling 

Once you notice these signs, replace the spark plugs. It will be best to contact a certified mechanic to check this issue as other factors may manifest these symptoms. 

Don’t hesitate to replace the spark plugs if you discover the spark plugs are at fault after the inspection. The following video will come in handy in terms of spark plug replacement. However, if the spark plugs only come loose, re-gap them. And the plug gap should be at 0.45. 

3. Fuel Injector Issue

The fuel injector is an important component of the fuel system of your car. It injects fuel into your engine in a specific pattern at certain time intervals to optimize engine performance. 

fuel injector

If the fuel injector gets clogged or damaged, it affects the air-fuel ratio of the engine. As a result, your engine will experience a misfire and a loss of power during acceleration. 


To fix this issue, you should replace the fuel injectors if they are at fault. We recommend you change the fuel injector professionally. On the other hand, you can check out this tutorial to learn how to replace this component to DIY this if you are mechanically inclined. 

4. A Bad Fuel Filter

A dirty or damaged fuel filter restricts fuel flow to your engine and your engine will choke out because of sufficient oil. This problem becomes more significant or notable when you accelerate. 

bad fuel filter

You will also experience engine shaking, hard starting, or misfires if the fuel filter gets dirty or damaged. 


Changing the fuel filter is an easy solution to avoid the bog-down issue. Fortunately, it’s quite simple to replace the fuel filter.

Just check your car manual and follow the step-by-step guide to have the fuel filter changed. You can also check the below tutorial to learn how to replace the fuel filter on Chevy. 

5. Fuel Pump Gets Bad

A fuel pump pumps the fuel to your car engine. If this pump gets clogged or bad, it fails to deliver fuel supply to the engine. And without sufficient fuel, you can’t start the engine or cause slow acceleration. 

fuel pump

Old age, dirty fuel, or electrical faults cause the fuel pump to go bad. When this component is at fault, you will experience stalling, get low fuel pressure, and struggle to start the engine. 


There is no alternative option- except to change the fuel pump if it gets dirty or damaged. If you are mechanically inclined, you can watch this tutorial to learn how to replace the fuel pump. 

However, we recommend you bring your car to a car mechanic to do this task for you as it requires a lot of expertise.  

6. A Clogged Catalytic Converter

A catalytic converter is an indispensable part of your car’s exhaust system. It helps to expel harmful exhaust gasses like carbon through the tailpipe. 

If the converter gets blocked, the engine will fail to reduce carbon emissions blowing from the exhaust system. As a result, your vehicle will lose its ability to rev to its fullest. 

In other words, if the gasses won’t get away from the exhaust, your car engine fails to produce maximum power, which causes it to bog down when accelerating. Typically, the catalytic converter gets restricted if you use your Chevy exclusively for short journeys where it never reaches full operating temperature. 


For a blocked catalytic converter, replacement is the only solution. We recommend you bring your car to a certified mechanic to replace the catalytic converter. If you are mechanically inclined, you can do it yourself. And this video will help you in this case: 

7. A Bad Distributor

If you have a Chevy truck prior to the 2000s, a bad distributor or its cap is the culprit that causes your car to hesitate to start during acceleration. 

The distributor works the same as a modern car with a full computerized electronic ignition system. It provides electricity to the spark plugs through the spark plug wires the cylinder needs to ignite the air and fuel mixture inside the cylinder. 

When the distributor or its cap gets cracked over time, it fails to provide sufficient electric power your engine needs for normal operation. As a result, your old Chevy truck bogs down during acceleration. At worst, you can’t even start the engine anymore if the distributor or its cap gets severely damaged. 


The following symptoms will indicate that the distributor or its cap & rotor gets damaged:

  • Experience hard starting and accelerating problems
  • Rough idling 
  • Unusual noise coming out of the engine
  • Difficult to turn the vehicle over

As soon as you observe these signs, inspect the distributor or its cap for damage. If needed, replace the whole distributor.

You can check out this article from Car From Japan that gives an in-depth guideline that helps you to replace the distributor cap or rotor. 


Every car owner or driver wants to drive a vehicle smoothly. But the heck is- every electric or mechanical product starts malfunctioning over time. And your Chevy truck is not an exception to that. 

Like other cars, it also misfires, bogs down, or gets sluggish during acceleration. Fortunately, we mentioned all the suspects that cause your car to slow down when accelerating. 

So, inspect your Chevy following the troubleshooting steps we provided to find the source behind this problem and replace or repair the part to fix the issue. 

Good Luck! 

About John M

John contributed as a technical head at an automobile company just 2 years after his post-graduation in Automobile Engineering. He loves to lead a free life, so he left his job & started blogging. Now, he does research on every automotive problem, part & product and seeks a better solution & best products & shares his findings with his readers to help them as well as to minimize their struggle.

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