Skip the auto shop - Our mechanics make house calls

Q: Car shakes, rpm needle drops to 400rpms and slow acceleration

asked by on

Yesterday night, I was driving and I stopped at a red light when my car began to shake and it feels like it wants to turn off.The service engine light came on and it also hesitates when I try to accelerate.

My car has 78678 miles.
My car has an automatic transmission.

Hello, There are a number of reasons that may cause the check engine light to come on and the engine to shake. Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than normal. Anytime a misfire is caused, this causes an imbalance in the motor which will cause the motor to shake or vibrate. This may also cause the car to hesitate to accelerate as you describe. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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: I have a 2002 Nissan Xterra that won't start.

If there is power to the rest of the vehicle, this is likely related to a faulty wiring issue or potentially something like a bad starter relay or connection to the starter. The starter relay directs power from the battery...

Q: The shift lever is hard to move.

When a shifter becomes hard to move, it is usually the interlock cable. AKA, shift cable. This cable slides in a housing and connects directly to the transmission. When this cables becomes worn, it gets hard to move inside the...

Q: When i slow down to turn or go somete the car will act like its in netural and just rev its 2003 350z

Anytime you are having difficulty shifting, or the transmission does not feel as if it is in gear, you should check the fluid level and condition. If the fluid has been in the vehicle for 100,000 miles or more, it's...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.