Skip the auto shop - Our mechanics make house calls

Q: Car jerks after taking foot off gas

asked by on

When I take my foot off the gas, the car jerks and makes a sound like a crumbling plastic bag. I noticed that the transmission fluid is dirty, but was told not to flush because it's a high-mileage car.

A: I'm not sure about the "plastic ba...

I'm not sure about the "plastic bag noise". The jerking upon deceleration could have something to do with the transmission not downshifting properly; this could be due to internal transmission mechanical problems, or a problem with the electronic transmission controls. Flushing or changing the transmission fluid generally doesn't help if you already have transmission problems. In fact, it usually makes things worse. I suggest transmission fluid exchanges (not flushes) as preventive maintenance for all vehicles. For your vehicle, I recommend that you have a professional, such as one from YourMechanic, inspect your Kia's transmission, and run a diagnostic inspection of the noise you are hearing.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Slow slipping transmission, how much longer will it last?

If you are out of warranty, you'll need to have your vehicle checked for problems with a qualified technician such as YourMechanic. They can come to your home or office, perform a road test, check your transmission for mechanical or...

Q: Passenger's side window not working

Hi. This issue is because of the switch on the door. It can be the individual window switch or the master driver side switch. A certified mechanic can come and inspect your vehicle to diagnose and repair your window issue....

Q: Front right wheel bearing. Costs of labor, parts needed( minimum or complete) tools needed???

Sent to CS 8/6 go to this link to get the correct quote to have the work done by YourMechanic. [] This sight will tell you about our quoting and allow you to get the quote to get work done....

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...