Q: Rough idling, hard shifting and shuddering at the highway

asked by on

I bought a previously owned car, which has some issues both while idling and driving. When the vehicle is not moving, like at the traffic light, it idles very roughly. Also, it is very hard to shift gears while I'm driving on the highway. The hard shifting is accompanied with shuddering and chirping sounds. What should I do?

Thanks for writing in about your 2002 Isuzu Trooper. The rough idle may be due to the fuel injection system being dirty or having an engine vacuum leak causing a lean condition. The hard shifting and shuttering with the chirping sounds like you have an automatic transmission lock up converter problem and should have the transmission checked. I recommend having a transmission expert inspect your rough idling and hard shifting issue in order to make the correct repairs for this scenario.

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. Rough idling, hard shifting and shuddering at the highway

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: Q: Whining noise coming from car

This may be potentially related to a failing alternator as these are known for making a whining sound when they are beginning to fail. When this happens, you may also notice your battery light to come on or the Check...

Q: Gear shifter loose

That’s a tough one to figure out without actually looking at it. There’s a roll pin and a spring to attach the lever to the column. The position of the shifter P,R,D etc, is held in place by a mechanism...

Q: My gear shift cable may be broken but my car won't. What could be the issue?

Hello, thank you for writing in. Without the vacuum supply from the engine, the brakes become hard to press. The vehicle is designed not to start when it is in gear. This is a safety measure ensuring the vehicle is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.