Skip the auto shop - Our mechanics make house calls

Q: Car shakes and jerks

asked by on

My car shakes when idling after first starting it up. It also jerking when I go 40 MPH. And it acts like it won't start sometimes. I'm guessing I need a tune up, and I fear my fuel pump might be going out.

A: Hi there, when you say jerking do you mean ...

Hi there, when you say jerking do you mean a vibration or changing in speed? If the car changes in speed, then you should make sure your fuel pressure is okay. Other Impala owners have reported a shaking at startup and one solution is to let the fuel pump prime itself before starting the engine. To do this, turn the key to the ON position without starting. You should hear the fuel pump whirring slightly towards the rear. Let it build up some pressure in the lines and then you should be okay. A certified technician, such as one from YourMechanic, would be able to test your fuel pressure to see how the pump is doing and diagnose any other issues that are causing the car to vibrate.

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

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 accelarates to 3000 rpm in park or neutral.

The throttle position sensor (TPS) is most likely failing. Air leaks in the intake can also generate a high idle, but not usually this high. If you need to have this checked, have a local mechanic, like one from YourMechanic,...

Q: Quick question about my 04 Ford Ranger edge fuel cut off switch

You did not give a specific questions but the fuel inertia switch is in the right kick panel of the truck. The fuel pump can be tested to see if it is getting power throught the switch when key is...

Q: Front left tire shakes during braking

You may have a warped rotor, this can be checked with a dial indicator to measure the runout of the suspecting rotor. If the rotor is okay then you may have an ABS problem with the wheel sensor causing the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.