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

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: Best brand of spark plugs for a 2012 Subaru Forester

Stick with the iridium spark plugs. The car was designed to run correctly with those spark plugs. A lot of times people try to sell you the more expensive ones and it's more of a gimmick than anything else. That...

Q: Car accelerating weirdly.

If the red brake light is on, it usually means one of two things. Either you have a hydraulic leak in your brake system, or your emergency brake is on. The emergency brake being on even partially can cause your...

Q: I just got a tune up now it's all of a sudden jerking and when I pull off has no acceleration

What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.