Q: Engine shakes intermittently after warmed up with car in "drive" at a stop. Single shakes at a time.

asked by on January 15, 2017

Hello,

My instructor at the technical school sprayed my throttle plate (butterfly) with cleaning fluids to clean plate and throttle body. There was just some carbon buildup inside.

Later we (students only) changed the spark plugs with NGKs that came originally on the car. No torque wrenches were used. Coil packs for cylinders 4 and 6 had been incorrectly connected and led to P0300. We corrected the problem. Engine ran for a minute or so on 3 or 4 different engine starts with the issue before we swapped connectors.

A couple days later I notice that while my car is stopped while in drive, the car engine does a single shake. It happens again the following day. Both times were after I had taken short trips and warmed up the engine. Just yesterday I took the car on a long trip and every time I came to a stop, the single shakes occurred often. So it definitely happens after engine is warmed up.

Runs fine on the highway. I even get the same fuel economy as before.

Any ideas?

Thanks!

My car has 149600 miles.
My car has an automatic transmission.

Hi there. There could be an issue with the fuel system or with the ignition system on your vehicle. It seems that the engine is having a minor misfire. Check the spark plug wires and see if any of them have a split in it causing them to go to ground. Also, make sure that the wires are attached to the spark plugs correctly. The engine and transmission mounts will also make the bumping feeling as the engine is hesitating from high mileage. Check to see if the mounts are loose or worn. If you need further assistance with your engine shaking, then seek out a professional, such as one from Your Mechanic, to help you.

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

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

after my car been running for a while it jolts like it don't want to stop

In the majority of vehicles, engine idle speed is controlled by an idle control valve (ICV). The ICV valve can fail or a faulty or blown fuse in other electronically controlled systems can cause the IAC motor to malfunction, leading...

Replacing engine mounts

There are at least 4 replaceable mounts on this vehicle covering the engine and transmission. The part numbers vary depending on whether you have a manual or automatic transmission. If you are replacing motor mounts the preferred parts source is...

Car shaking & making loud noise only bt 30-40 mph.

Hi there. In most cases, an engine misfire is caused by either an ignition or fuel system related component. Specifically, either a fuel injector is not firing correctly or the spark plug or ignition coil is not firing correctly. The...

Related articles

The Best Used Cars to Buy If You Like to Go Off-Roading
Your Your best bet for off-roading is a 4x4 SUV. Depending on the model that pleases you most, though, you might have to shop around a bit to find a good used one. That’s simply because off-roaders typically become very...
How to Troubleshoot a Car That Shudders When Turning
If your car steering wheel shakes or shudders when turning, it could be the tires, power steering, or steering damper.
Symptoms of a Bad or Failing Timing Chain
Common signs of a faulty timing chain include engine misfires, metal shavings found in the oil, and rattling sounds from the engine while idling.