Skip the auto shop - Our mechanics make house calls

Q: Slow acceleration

asked by on

All of a sudden car lost power would accelerate very slowly even when the peddal was pushed down all the way. I just changed the throttle body and mass airflow sensor I also changed a spark plug Coil.I don't know why its doing this

My car has 187000 miles.
My car has an automatic transmission.

Thanks for writing in about the acceleration issue with your 2007 Volvo S60. At first glance, I’d agree with you that the problem would be caused by the MAF sensor, as that’s what commonly causes the slow acceleration issues and can be a typical problem with many Volvos. However, it could be a problem with the throttle module located right under the intake manifold.

Restriction in air or fuel flow might also be causing this problem to occur. Changing the fuel and air filters might seem to be a simple solution, but in many cases this solves the problem. Keep in mind, I believe that the throttle modules on Volvo’s are warrantied for for 10 years or 200,000 miles - putting you barely under the warranty claim level. I’d call the dealership about the throttle module issue and see if your car is still covered. If not, contact a certified mechanic, such as one from YourMechanic, who can test drive and diagnose the acceleration issue in order to move forward with correct repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Slow acceleration

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car shaking more the faster I get

Several ideas come to mind. Tire issues sometimes manifest themselves as speed related issues. Out of balance tires will vibrate the faster you go. Also tires that are separated or have flat spots will do the same. If the condition...

Q: Water leak

If the leak is water, it could be the windshield washer reservoir leaking. However, if the leak is coolant, that could be due to a leak in the radiator if the radiator was hit. Generally, engine coolant leaks occur due...

Q: Something wrong with car's electric.

Hello, it seems like your car is in some kind of limp home mode. I would suspect you are correct that there is an electrical problem. I would have the charging system and battery checked, to be sure it in...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.