Skip the auto shop - Our mechanics make house calls

Q: 2 Major jerks felt today while accelerating from stop.

asked by on

I have a 2008 Subaru Outback 2.5XT with the turbo. I just had timing belt changed out and 2 new front axles replaced and been driving great, only has 98k miles on car. But today I was at a stop light and when I slowly accelerated there was 2 hard jolts that were so hard I turned around to see if someone had rear ended me because it was such a hard jerk. Got home drove around a bit, put in reverse and seems fine again. can you help

My car has 98000 miles.
My car has an automatic transmission.

Hi there. There could be an issue with the throttle position sensor (TPS) or a sticky throttle plate. First check to see if the throttle plate is sticking. If the plate is working properly, then check the TPS for any damage and look at the plug for any burns or moisture. Check the computer for any pending codes. If the vehicle jerked, even if the engine light is not on, there could be pending codes. If you need further assistance with the vehicle jerking as if another car hit your vehicle, then seek out a professional, such as one from Your Mechanic, to help you.

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: I think my cv boot came off!

I am glad you asked this question. I am going to go through some steps with you to ensure that you have the correct problem diagnosed. When you look at the wheel well on the side where you...

Q: My dad decided to push and clean my electric throttle body now my car is accelerating into second gear without me touching the gas

Remove the intake hosing to the throttle body and start the engine with the parking brake on and the transmission in park. Have someone throttle the engine as a snap throttle (to the floor and back very quickly but not...

Q: Auto start stop dissconnected check engine warning message and light 2014 Ford

Hello - most likely the throttle position sensor (part of the electronic throttle) has a fault. Since the "auto stop-start" mechanism depends heavily on successful operation of the TPS, any quirk would endanger safe operation of the "start" sequence. Software...

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...
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...
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.