Q: 2003 Hyundai Sonata 2.7 v6. Hello my car randomly bucks / jerks at stop lights in drive and is way worse and constant when the ac is on.

asked by on

2003 hyundai sonata 2.7 v6. hello my car randomly bucks/jerkes at stop lights in drive and is way worse and consistant when the ac on. i have replaced the TPS,Cleaned and switch the IACV with a used one from a parts yard,new fuel pump,new CSPS,new O2 sensor because CEL was on that was fixed. any ideas of what i could try next?

My car has 125000 miles.
My car has an automatic transmission.

Hi there. It sounds like your engine is misfiring. Check the spark plug and wires to see if they are firing. If the spark plugs are firing, then the fuel pump could have an issue or the injectors could be plugging up. If the fuel pump is good and the injectors are clean, then the engine could have a worn timing chain causing the camshaft timing to be off when the engine is loaded and floating. If you need further assistance with your engine jerking, 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
  1. Home
  2. Questions
  3. 2003 Hyundai Sonata 2.7 v6. Hello my car randomly bucks / jerks at stop lights in drive and is way worse and constant when the ac is on.

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: Engine erratic behavior, misfiring hard starting every now and then

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Q: My 2003 Dodge Durango will not move in reverse, but drives fine in drive?

Hi There, This is a somewhat common problem with the Dodge Durango transmissions and is often times linked to low transmission fluid for a period of time that will eventually result in the transmission bands being damaged similar to clutches...

Q: How often are you suppose to replace a new throttle sensor ?

The throttle position sensor (TPS) is only replaced if it tests bad. So there is no fixed replacement interval or "lifetime" for that part. They do occasionally fail though, in which case the Check Engine Light will illuminate with specific...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...