Car shakes when I press on the gas above 40

[Jose]

I have a 07 sentra and the car shakes when I press on the gas above 40 and Its not a tire balance problem since I already did that. It only happens when I press on the gas and when I let go of the peddle it stops. Any suggestions? Thanks

Topic

[Chad]

Is the shake thru your steering wheel or through the seat of your pants? If it’s thru the steering wheel, then you could still have a wheel balancing issue or a bent rim. If it’s thru the seat of your pants, it could be a number of things, but I’d look driveline first since you say its only happening after 40mph.

[Jose]

Through the steering wheel and the seats. I can see the passenger seat shake when I press on the gas but stop when I’m on costing.

[Chad]

Sounds like you might have multiple issues. I would inspect the wheels for damage on both the rims and your tires. If you don’t see anything, I’d have them balanced again. Many wheels are not hub centric, and need to be balanced on the proper equipment.

I’d also inspect your driveshaft, as well as your u-joints for the vibration coming thru the seat.

Did you change anything about the vehicle, or all of this just started out of the blue?

[Jose]

It just started out of the blue about a month or two ago

[EricTheCarGuy]

My guess is driveline or transmission issue. I’d start by checking the axles and CV joints. If you don’t see anything abnormal there, then check the transmission fluid level and condition. More info on solving vibration issues here.

http://www.ericthecarguy.com/faq/determining-the-causes-of-vehicle-vibrations

Keep us posted on what you find.

[Jose]

Thanks I will try that

[EricTheCarGuy]

Cool. Keep us posted.

[Lorrin Barth]

People are suggesting tires or drivetrain but it could be an ignition problem. Faulty ignition can break down when load is put on the engine. At forty mph you’d be in a higher gear hence more load on the engine.

[Brandon Driskill]

I agree, check the drive-line first. My 1994 Corolla did that same thing, because the inner CV joints were worn out.

[Author]

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