Q: Difficulty accelerating, car jumps while idling, burnt fuel smell

asked by on

I'm having some acceleration issue lately. When I apply the gas pedal, the car has difficulty increasing speed and it feels as though it would die out. Then I have to press it to the floor, which makes the car start tugging and then accelerate. Also, while the car is idling, it would jump up and down and then I can smell burnt fuel. This happens usually at the traffic light but sometimes even while I'm driving. While I'm applying the brake, the car would jerk forward. What is causing these issues? Thanks.

A: A few different things can cause all of the...

A few different things can cause all of these symptoms. The most likely would be a failing fuel pump, bad spark plugs and wires, a MAF sensor issue, vacuum leak, or a faulty oxygen sensor. A qualified technician, such as one from YourMechanic, will be able to diagnose your vehicle's perceived loss of power and perform any repairs required.

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・Save up to 30%

Get a quote

What others are asking

Q: Sudden jerk upon acceleration, low gas mileage - 2013 Range Rover

Hey there, thanks for writing in about your 2013 Range Rover. You may have a problem with the throttle control that may be dangerous to drive. There are many other possibilities, such as a vacuum leak, faulty mass air flow...

Q: High-pitched chirping noise and rattle from front of 2008 Saturn Astra

Hey thanks for writing in about your 2008 Saturn Astra. It is unlikely the problem is cause by the engine "not being strong enough" to power the accessories. If the noise changes while turning the air conditioning on and off,...

Q: Timing belt cover leak

The leak is likely due to a failed timing chain cover gasket. However, the water pump is driven off the timing chain and located behind the timing cover. So, if the vehicle is leaking coolant from the timing cover area,...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.