Skip the auto shop - Our mechanics make house calls

Q: I changed the spark plugs and now my car is puttering, revving up on its own, and making a whistling noise

asked by on

Changed spark plugs for tune up now it's puttering. Revving up on its own and a high pitched whistling noise. What could cause this problem???

My car has 240000 miles.
My car has an automatic transmission.

If these symptoms did not exist prior to the spark plug replacement, it would appear as if something was disturbed, disconnected or broken during that maintenance. You want to make sure that all of the plugs were installed with the required gaskets and tightened to the correct torque, using only a torque wrench. if the plugs are loose or gaskets are missing, air will leak in and out of the combustion chambers. Also ensure that no engine sensor electrical connections or terminals were disturbed or left disconnected and that all coil on plug assemblies are intact and properly connected. If none of those checks resolves the issue, please free free to schedule a rough running engine diagnostic to identify the problem.

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
  • Home
  • Questions
  • I changed the spark plugs and now my car is puttering, revving up on its own, and making a whistling noise

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 stalling in the summer

Hi. Your vehicle may be experiencing an overheating issue. Also the stalling can be due to a drop in pressure in your intake system. If your Check Engine Light is illuminated, a mechanic sent by YourMechanic can scan the car's...

Q: Hello I just wanted to know what could be the problem with my car I have a 2004 Kia Rio and it stalls I thought it had a bad fuel

Hi there. Typically, a vehicle will start and then quit because of an issue with the fuel or electrical system. It is important to monitor fuel levels as well as warning lights which can signal to the driver that a...

Q: Why is my power steering pump so noisy?

This may be caused by the pump simply being worn out or being forced to work too hard as a result of the rack and pinion system not functioning properly. As you may know, the rack and pinion system also...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...