Skip the auto shop - Our mechanics make house calls

Q: SUV lurches forward with acceleration

asked by on

When my SUV accelerates, it lurches forward. The lurching is sudden, spasmodic, and uncontrollable; it is very dangerous while driving in traffic and could cause an accident! There have been several near-misses. The engine’s software seems to be causing the problem. When I need to accelerate, the turbo charger ‘slams’ into action and the car is very roughly pushed ahead. In my opinion, someone needs to redesign this turbo charger’s controlling software so we drivers can know that when we press the gas pedal, it will steadily and smoothly increase in speed without this unpredictable, unsafe forward thrusting. Do you know how I can solve this problem with a permanent fix?

A: Hello. The first thing that I would do is t...

Hello. The first thing that I would do is to find out if the dealer has any technical service bulletins relating to your current problem. If there is a technical service bulletin related to your problem, you may be able to take the vehicle back to the dealer to have it repaired free of charge.

It is also possible that the primary control module (PCM) requires an update or reprogramming and that would solve the problem.

Lastly, the electronic throttle body could be malfunctioning which could cause the car to lurch forward during acceleration. It is possible that a repair like this would be covered under warranty if your has not yet expired.

If you’d like a second opinion on this, consider YourMechanic, as a certified technician can come diagnose the jerking with your car and suggest what to do from there. Best of luck.

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: Check engine light is on.

Hi there. Check the wastegate on the engine and see if its opening when the engine is throttling and letting off the throttle. If the wastegate is not moving, then check the hose to the wastegate and see if its...

Q: Engine sputtering and oil is leaking

Hello. My biggest concern would be the oil leak. I would need to locate the cause of the oil leak and also see how low the oil was when this issue occurred. If the engine oil was low enough, then...

Q: Car hesitates when accelerating, plus lurches & stalls

When faults are intermittent such as this, they can be much harder to diagnose. Especially if they do not leave a code of some sort. A few different components can cause this fault. The most likely would be a fuel...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.