Q: Car won't accelerate - 2005 Hyundai Tucson

asked by on

It seems that when I'm on the highway, and there's a lot of traffic, so I have to break and accelerate numerous times, the car heats up and I cannot accelerate. I had to pull over, and for the rest of the trip stay in the right lane. This happened on a couple of trips, but when the speed rate is more or less consistent, I don't seem to have this problem.

My car has 109000 miles.
My car has an automatic transmission.

A: Hi there. Although it's hard to diagnos...

Hi there. Although it's hard to diagnose a problem remotely, I believe the root issue that may be causing most of the acceleration problems are overheating issues. Sometimes when an engine overheats, it triggers and error code to trim back fuel flow or reduce the acceleration on the vehicle (in attempt to control the temperature). Usually, when a vehicle overheats in traffic it is due to a problem with the fan or the thermostat failing to open when it should. The best way to pinpoint the source of the issue is to have a local mechanic diagnose the acceleration problem and repair the root cause of the issue.

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: Car won't start

There are several issues that could be related to your car not starting: Faulty crankshaft sensor Faulty camshaft sensor Burnt engine valves Blown head gasket No spark getting to the spark plug Lack of fuel pressure from the...

Q: Whistling when the car is turned off, throbbing hum at 80+mph

Hello. It sounds like you have a few issues here. The noise that occurs when the vehicle is turned off typically comes from one of the engine's accessories. It can also come from a timing belt issue, such as the...

Q: Trouble starting and accelerating

Hi there, thanks for writing in about your 2002 Hyundai Elantra. There are several possibilities here that require further research. First off, it sounds like your transmission is in "limp" mode, which causes it to start off in 2nd gear...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...