Q: I got a new fuel pump and filter and when my car is stopped it jumps up and down why?

asked by on

My car hasn’t been driveable for about a month. Took it to the mechanic yesterday and got a new fuel pump and filter installed. It drives well but when I am at a stop the car seems jumpy and feels like it is shaking up and down. However, when my car is in Park the shaking stops. Why is it doing this?

My car has 112000 miles.
My car has an automatic transmission.

It’s either motor mounts or an engine management fault (ignition, fuel, air induction, etc. but also including uneven cylinder compression and mechanical issues) or perhaps a combination of the two. The root cause(s) of the problem can be pinpointed if you request an engine vibration diagnostic. To evaluate motor mounts, you can try shifting from "neutral" to "drive" and back, while the engine is running. If the vibrations disappear or reduce dramatically in "neutral," a possibility is you need new engine mounts. All other tests will require sophisticated diagnostic tools and hence I encourage you to request the engine vibration diagnostic to get this resolved. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I got a new fuel pump and filter and when my car is stopped it jumps up and down why?

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: The coolant level is low when the engine is cold

If you're finding that your coolant is running low, especially during colder weather, it's a pretty good indication that you've got a coolant leak somewhere. However, the problem with coolant systems today is that they can give you false indicators....

Q: Q: How do you turn off daytime running lights

Daytime running lights will come on and stay on all the time during the day and cannot be turned off unless the normal headlights are turned on. The daytime running lights should not stay on after the vehicle is turned...

Q: Hello I have a Chevy cavalier 2.2 L and I have a gas leak from my fuel filter to my fuel pump Line I have changed my Oring

Hi Devonte. Thanks for the question tonight. In most cases, when an O-ring is suspected of being the source of a fuel leak, it's replaced but the leak exists still there are three reasons why. First, the o-ring may have...

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...
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...