Q: Bucking during acceleration.

asked by on

Hello. I have two issues with my car. First issue is, while driving if I where to go over say 30 - 40 mph, the car would buck until I let go of the gas or accelerate out of the jumping then it would be fine, until I slow and start speeding up again. Sometimes the bucking would occur at higher speed as well. I don't have a check engine light on for this problem.

The second issue is my engine cooling fan and my auxiliary fan doesn't run on its own. I don't have any overheating issues with the car although, I can only use defrost/air condition while car is moving otherwise I would get what I think it's refrigerant shooting out the front of the car.

Any help on this would appreciated. Thank you for replying

My car has 111000 miles.
My car has an automatic transmission.

Hi there. It does sound like you have several different problems going on here. The bucking is usually the result of a failure in the throttle position sensor or the air flow meter. Both of these will commonly cause these same symptoms on this vehicle. I usually check these with a scan tool to make sure they are fine. It can also be a transmission problem, but that is not too common on this car. As for the fan, most of the time this is a failure in the fan assembly itself. The fans fail and will no longer turn on. It can also be a problem with the circuit so I usually test the motor for the fan first and then diagnose the circuit if the fan is fine. If you want to have this bucking and this cooling fan problem checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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. Bucking during acceleration.

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: The electrical throttle light came on and now my car won't start. What is the problem?

The electronic throttle controls throttle opening and if there is a fault in any computer systems that the computer is programmed to limit throttle opening and even cause not to start again. You may need to have computer scanned for...

Q: Engine overheating light on

Hi there. Many components make up your cooling system. If any of these components are not functioning properly, it will cause your vehicle to overheat. If your vehicle is not leaking, any coolant changes are that your radiator fan(s) are...

Q: Axle seal leak

The axle seal leak is unrelated to the flat tire you had. The purpose of the axle seal is to keep transmission fluid from leaking. Depending on the size of the leak, it may be okay to drive with a...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...