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?
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. 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: Engine occasionally cuts out while idling at a stoplight and occasionally hesitates and bucks upon acceleration.

There is a issue with the fuel delivery to your engine. It seems as the fuel pump may be failing. Check the fuel pressure on the fuel rail and see if there is at least 30 psi. If the fuel...

Q: Does a Kia soul have an inertia switch? I was in a fender bender today and my car won't start

This car does not have an inertia switch for the fuel pump. Since you were in an accident then your vehicle crash sensor system will need to be fixed and codes cleared for the fuel system to be activated using...

Q: Steering wheel making noise

The power steering fluid on these vehicles gets too thick in cold temperatures and may blow any of the components or hoses in the system. The fix is to fix any broken component and flush and fill with new lower...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...