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.

A: Thanks for writing in about the acceleratio...

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!

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: When the gas is pressed, the RPM increases, can't accelerate

From what you are describing with the RPMs going high and the vehicle not moving, it sounds like you have a transmission that is not shifting or is slipping. There is a technical bulletin that may stop the flare and...

Q: oil leaking and smoke coming from engine

The source of the oil leak may be near a hot component like the exhaust manifold. If the engine valve cover or the crankcase ventilation system is leaking oil, it may run down the side of the engine to the...

Q: I put a fuel injector cleaner in my car and had been stalling at a stop and lags when I'm driving. New fuel filter, still stalling out.

For the condition of the engine rpm's changing either the Idle Air Control valve is not working properly and needs cleaned out or the EGR valve is sticking causing the engine to bog down and stall out. I recommend taking...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...