Subaru Ascent Car is slow to accelerate Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(2,304)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(2,304)

Car is slow to accelerate Inspection Service

How much does a Car is slow to accelerate Inspection cost?

On average, the cost for a Subaru Ascent Car is slow to accelerate Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2020 Subaru AscentH4-2.4L TurboService typeCar is slow to accelerate InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
2021 Subaru AscentH4-2.4L TurboService typeCar is slow to accelerate InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2019 Subaru AscentH4-2.4L TurboService typeCar is slow to accelerate InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2022 Subaru AscentH4-2.4L TurboService typeCar is slow to accelerate InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
Show example Subaru Ascent Car is slow to accelerate Inspection prices

A car that is getting fuel and is properly tuned should take off quickly when the accelerator is pressed. A vehicle that is sluggish or slow to accelerate can be dangerous, especially at intersections and on-ramps.

Modern cars have a very complex system that delivers fuel to the engine and rids of the vehicle of exhaust gases. A failure in any part of this system can lead to a car that is slow to accelerate. In the majority of cases, the problem can be traced back to the fuel system.

A vehicle that is slow to accelerate should be repaired immediately as it can be dangerous to drive.

How this system works:

The fuel system is responsible for supplying fuel to the engine. Fuel is mixed with air, atomized and vaporized in the intake system, which provides power to drive the pistons of the engine. There are a variety of different fuel system types but most of them have the same basic parts.

The fuel tank stores the gasoline. Fuel is pulled through the fuel lines by the fuel pump and is fed into the fuel injectors. Older cars have a carburetor and throttle body injectors instead of fuel injectors. The fuel injectors spray gasoline into the cylinders where it is mixed with air and then ignites during the compression stage. The result is an explosion that moves the pistons.

Common reasons for this to happen:

  • Bad or Clogged Fuel Injector: Fuel injectors can become clogged due to contaminates in the fuel. Fuel injectors, by their very nature, must be very precise in controlling the amount of fuel that goes into the combustion chamber so they have very small passages that deliver the fuel. Over time these tiny passages will become clogged which impedes the delivery of fuel.

When an injector is clogged it can degrade the performance of the vehicle and the car may accelerate slowly or feel that it does not have enough power. Other symptoms include a rough idle, a vehicle that is hard to start and a decrease in fuel efficiency.

  • Defective Fuel Pump: The fuel pump pulls the fuel from the gas tank to the engine via the fuel lines. If the pump stops working, malfunctions, or becomes clogged, it will not supply enough fuel to the injectors. This can cause the vehicle to accelerate slowly, or even sputter and stall, especially at high speeds.

  • Clogged Fuel Filter: The job of the fuel filter is to filter out containments in the fuel and if it becomes clogged it can restrict the amount of fuel that reaches the injectors. This can cause a vehicle to accelerate slowly. Fuel filters are designed to be replaced on a regular basis.

  • Dirty Airflow Sensor: This part detects the mass of air that enters the fuel injection system and hands that information off to the engines’ computer which allows the computer to deliver the proper amount of fuel to the air. These sensors can become dirty or malfunction over time, which results in the wrong data being sent to the computer. A slow accelerating car is the result of this incorrect data. It may also trigger the Check Engine light.

  • Leaking Fuel Line: A leak in the fuel line will drain off enough fuel that it leaves a shortage for the injectors. This not only affects the performance of the car but will also create a dangerous situation. If you smell gasoline in the vicinity of the car or see a puddle of fuel underneath the vehicle, the car should be inspected and repaired immediately.

  • Vacuum Leak: A leak in the vacuum system can affect the ability of the car’s computer system to properly regulate the fuel to air ratio. One of the major symptoms of a vacuum leak is a car that is slow to accelerate or feels like it has a lack of power. In addition the check engine light will probably illuminate.

  • Failing Catalytic Converter: A failing or clogged catalytic converter will prevent the proper amount of air from going into the engine. In most cases the vehicle will run hotter than normal, will accelerate slowly and feel like there is a loss of power. Issues with the catalytic converter tend to be fairly expensive repairs.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the car is slow to accelerate issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will check your car's fuel system for leaks and any defective parts. This includes fuel injectors, fuel pump, fuel filter, airflow sensors and other important components related to the vehicle's slow acceleration. It may be necessary to test drive the car in order to verify the acceleration issue and provide an accurate diagnosis.

How important is this service?

A car that accelerates slowly is a dangerous vehicle to drive, especially at intersections and on ramps. Failing to fix simple fuel system problems will often lead to a more expensive repair down the road and eventually a car that may not run at all. A slow accelerating car should be inspected and repaired as soon as possible.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Subaru mechanics

Real customer reviews from Subaru owners like you.

Excellent Rating

(2,304)

Rating Summary
2,195
56
16
10
27
2,195
56
16
10
27

Joe

15 years of experience
453 reviews
Joe
15 years of experience
Subaru Ascent H4-2.4L Turbo - Battery - Nashville, Tennessee
On time, correct work, completed quickly!

Theodore

16 years of experience
1601 reviews
Theodore
16 years of experience
Subaru Ascent H4-2.4L Turbo - Battery - Issaquah, Washington
He was quick and very nice.

Ceasar

8 years of experience
30 reviews
Ceasar
8 years of experience
Subaru Ascent H4-2.4L Turbo - Oil Change - Denver, Colorado
Great experience with Ceasar

Theodore

16 years of experience
1601 reviews
Theodore
16 years of experience
Subaru Outback H4-2.5L - Spark Plugs - Lynnwood, Washington
Theodore was a professional and took care of all my car needs in a timely fashion.

Excellent Rating

(2,304)

Rating Summary
2,195
56
16
10
27
2,195
56
16
10
27
Number of Subaru services completed
25344+
services done by our mechanics
TOTAL NUMBER OF EXPERT Subaru MECHANICS
700+
experts on our platform

Recent articles & questions

Is It Safe to Drive While Taking Anti-Anxiety Medication?
If If you suffer from anxiety, then you know that “sinking” feeling that occurs when you encounter something that stresses you, or even when you’re not exposed to a stressor at all (free-floating anxiety). You also know that feelings of...
How Long Does a Camshaft Seal Last?
The The air/fuel mixture that your car has is vital and the only way that the car will be able to complete the combustion process properly. A number of different components have to work together in order for the air...
P0228 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch C Circuit High Input
P0228 P0228 code definition Throttle/Pedal Position Sensor/Switch C Circuit High Input What the P0228 code means P0228 is a generic OBD-II code which indicates that the throttle/pedal position sensor/switch C circuit has a high input problem causing the sensor input...

EGR warning

Hello. An EGR valve that is intermittently failing will cause the Check Engine Light to turn off and on. If the code is for the EGR valve and the voltages to the valve are correct, then the EGR valve may...

Is it expensive to maintain a 2007 Mercedes-Benz SLK350?

Hi there. I am not sure what kind of vehicles you have owned in the past, but these are one of the most expensive vehicles to maintain. Compared to most American and Japanese cars, this Mercedes will cost about 2-3...

What sensor can cause delayed shift on a hard acceleration

Hey there. The transmission control module (TCM) helps regulate fuel efficiency and power while storing information about the transmission system in its memory. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (844) 997-3624 · hi@yourmechanic.com