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?
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. Car shakes, rpm needle drops to 400rpms and slow 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: Nissan squeaks a lot on bumpy roads

Usually when you hear squeaks over bumps this is related to a tie rod or a ball joint that has been dried out. If your tie rods and ball joints are serviceable, they will have grease fittings on them in...

Q: Hi guys! The breaklights on my 2002 Acura RL are not coming on at all. I just replaced the brake light switch and still nothing; w

Good question. The other day I had the same issue. I replaced the brake light switch and still no brake lights. The issue I came across was that it had to be adjusted a little. If you take the brake...

Q: transmission wont push back on clutch slave cylinder

Hello, The slave cylinder is meant to be bench bled just as a master cylinder is. If this is not done it can cause air to remain in the slave cylinder. This will allow the slave cylinder to fully compress...

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 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.
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.