Q: The car hesitates and jerks during quick acceleration

asked by on

Hello. I've taken my car to several mechanics and to the dealer, to try and fix the issue I've been having. The car runs fine at steady speeds but as soon as I try to accelerate quickly, my car starts hesitating for a couple of seconds. When I try to pass the car for instance, I give it gas and the car chokes until it manages to pick up speed. The car has gone 120,000 miles and has automatic transmission. Can you give me some advice please?

It sounds like you may be experiencing an issue with your fuel system. The fuel pressure regulator is one of the parts responsible for maintaining your fuel pressure at all rates of engine speed. Most fuel pressure regulators are controlled by engine vacuum. It is possible that your fuel pressure regulator has failed or the vacuum line that connects to it is leaking. I would consider the vacuum leak more likely considering that engines produce less, vacuumed at higher RPMs. I would recommend having your fuel pressure regulator as well as the rest of your fuel system inspected by a qualified technician. Ensure that this job is performed by a professional, such as one from YourMechanic as fuel can be very dangerous. If you are looking to solve this problem, I recommend a mechanic from YourMechanic to inspect and diagnose why your engine hesitates, during acceleration.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. The car hesitates and jerks during quick acceleration

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: Car chokes when accelerating and when at a stop

Hi there. Based on the events you have described, finding another mechanic would be recommended. Your vehicle choking could be the result of a bad fuel pressure regulator, but I would not recommend replacing anything else until the vehicle is...

Q: Cold engine misfire and hesitation - 1997 Dodge Dakota

Hi. I believe the ambient air temperature sensor, which measures the intake air temperature for engine management, has failed. It is reporting a far higher temperature than the engine is getting, as you have noted. Engine management is creating a...

Q: Transmission problems

Hello. The symptoms you are experiencing can be caused by a wide variety of issues. The first thing I would do is check to make sure that the transmission fluid is at the correct level and not dirty or contaminated....

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...