Skip the auto shop - Our mechanics make house calls

Q: I have a stutter when I am driving

asked by on

I recently had an issue with my radiator that caused a leak. I had a mechanic replace the radiator. I also had the valve gasket replaced as it had turned from rubber to plastic and broken off. Since these repairs, I no longer have heat at highway speed and I have developed a stutter between 1400 and 2200 rpm at speeds greater than 30mph. I also replaced the upper radiator hose last week. Before I added back the coolant that I lost, I took the car out and had full heat and the car seemed to be smooth with no shutter.

What I would describe as a shutter is once I am on the gas, it will vibrate hard in the front of the car. Shifting is fine and smooth. I am at a complete loss.

My car has 111000 miles.
My car has an automatic transmission.

The stutter, or vibration, could be due to an engine management (tuning) issue or is possibly caused by worn motor mounts that are allowing engine vibration to transfer to the body when the engine is under load. To evaluate the motor mounts, request an engine vibration diagnostic. If you do end up replacing motor mounts, genuine OEM mounts are recommended in order to maximize the chances of resolving the problem. If the motor mounts are not judged faulty, vibration and rough running can be caused by faults in the air induction system as well as the ignition and fuel systems. To obtain an evaluation of the running condition of the engine, please request a rough running diagnostic.


With regard to the intermittent cabin heat, that is typically due to an obstruction in the coolant flow to the heater core and that obstruction can be due to a problem with the heater control valve, a hose that is collapsing at times, or air pockets in the system possibly due to coolant boiling within the engine or exhaust gases leaking in to the coolant. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a cabin heater diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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
  1. Home
  2. Questions
  3. I have a stutter when I am driving

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: Advice on getting oil leaks fixed.

Hi there. It is very common for for your car to start to leak oil as it ages. Most of the time the leaks are at the oil pan or the rear main seal, but the oil level sender is...

Q: What can be causing vibrations to my vehicle - the rear engine mount or the exhaust pipe?

Hi there. To see if the engine mount is broken and making the vehicle vibrate, open the hood to your car and look at the engine while it is running at idle. See if the engine is moving around a...

Q: outside temperature thermometer way off, a/c not working, check engine light is on

Hello. The reading of minus 40 degrees does indicate that there is an open circuit in the sensor circuit. This will cause the A/C not to work and the Check Engine Light to come on. The sensor is in the...

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...
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...
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.