Skip the auto shop - Our mechanics make house calls

Q: Sluggish acceleration while in 2nd gear.

asked by on

I purchased the 2010 forester turbo diesel a few months ago but I have noticed yesterday the acceleration is sluggish . The issue mainly occurs in second gear but it has happened and 1st and 3rd. It feels like the vechicle is stuttering forward (almost like the vechicle is about to stall). After about a second or two the vechicle goes back to accelerating properly.

My car has a manual transmission.

This could be traditional "turbo lag" - I would check the turbocharger boost control components for air leaks, or poor electrical connections. I would also check the throttle position sensor, which may not always be recognizing your foot pressing the gas pedal. If you’d like assistance in diagnosing this issue, a certified YourMechanic technician can come to your location to perform an inspection of your hesitating acceleration and suggest any repairs to your vehicle.

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: Why does my brake light fuse keep blowing?

The brake light switch is powered by the fuse and then powers the rear brake lights and third brake light also. The power also goes into the body control module to signal to unlock the shifter interlock. I would first...

Q: Need to replace clutch assembly

From your description, it does sound like a worn out clutch. The clutch has a friction material much like brake pads do. This material wears out over time and symptoms like the ones you are describing are typical. The clutch...

Q: Lost only car key

Hi. Yes, there is something else you can do other than towing your car to the dealership. A lot of locksmith's have the capability to cut you a new key and program the key on site. Keep in mind the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...