Q: Car bucks going up hill

asked by on October 05, 2016

Car bucks going up hill runs ok on level ground

My car has 89000 miles.
My car has an automatic transmission.

Fuel Pump Replacement $145.32 - $1299.70 Get a Quote
Fuel Filter Replacement $98.50 - $325.56 Get a Quote
Fuel Injector Replacement $400.56 - $3968.30 Get a Quote
Car is hesitating and bucking Inspection $94.99 - $114.99 Get a Quote

When your vehicle climbs a hill, the additional stress is sometimes too much for it to handle. Judging by the "bucking", it seems the engine is struggling to combust the air/fuel mix in the cylinder. This can be due to sensor issues, and various other components failing. However it is likely that the engine is losing compression. A compression test can be done to determine if your engine is within specifications.

If you were having sensor issues, you would likely set off a diagnostic troubleshooting code. Have your vehicle scanned for codes. If your vehicle does not have any codes, and passes the compression test, you will want to look at the fuel delivery system next. Inspect the fuel pump, filter, injectors, and other components specific to your make and model.

If you need help with this repair, consider YourMechanic, as one of our mobile technicians can come to you and diagnose the bucking you’re experiencing firsthand for an accurate repair.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How Do Belt Tensioners Work?
The belt tensioners (https://www.yourmechanic.com/article/how-belt-tensioners-work) in your car work to ensure that there is enough tension on your serpentine belt, or other drive belts, so that everything in your engine compartment (your alternator, water pump, air conditioning compressor, etc.) operates the...
Car key won't turn
Hi. There are only a few reasons why your key will not turn. Most of the time it is because the steering wheel is locked in one direction putting pressure on the key lock cylinder, or the cylinder is not...
Power antenna not working
The problem is most likely the motor for the power antenna. Motors wear out over time (28 years) and will eventually stop working. I would first check the fuse to see if it is blown, if so the antenna motor...
hello i have a 2000 sierra 5.3 idling high and tranny shifts when its idling high seems like it does it when its warmer weather tu
If I am understanding your question correctly, it sounds like the engine is idling high, but I don't understand the transmission issue you're having. The high idle is most likely an intake manifold vacuum leak at the gasket O-rings. This...
Audi a1 glow plug light come on then goes offi
Hi there, thanks for writing in about your Audi A1. If the light is coming on that often then there may be a particular filter issue. I would need to scan the computer to see what codes are present. If...
2014 hyundai elantra se Electric power steering light turned on. How much will it cost to get it fixed?
Hi...I will try to address your concerns and, as well, obviously you can request an electric power steering diagnostic (https://www.yourmechanic.com/services/steering-wheel-is-hard-to-turn-inspection) which will get you a really quick and precise answer as to cost because the mechanic will be able to...
How much should it cost for the dealer to clean the throttle body, and MAP sensor, and replace the PCV valve cover on my jetta?
Hi There, Unfortunately, there is not a uniform pricing system when it comes to what various dealers charge. Many things come into play (availability of parts, wholesale pricing, access to labor, overhead, etc.) for various repair shops when it comes...
Bad Ac compressor locked up and has been bad for a year will it have extra damage?
Hi Tiffany. Thanks for writing in today. The AC compressor is a stand alone system, meaning that if it's damaged, it won't necessarily damage other vehicle systems. The clutch on the compressor is what allows the pulley to engage and...
Loss of brake power/pressure once ABS is activated
If the pedal is sinking to the floor, you have a problem with trapped air in the hydraulic system, a leak, bulging hoses to the 4 wheel positions (the flexible rubber hoses) and/or a faulty master cylinder. To have the...

Related articles

The Best Used Cars to Buy That Can Be Towed Behind an RV
Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Then they tow their car behind it – sometimes this practice is called...
Is it Safe to Drive With an EVAP Leak?
While it is safe to drive with an EVAP system leak, it causes excess car pollution. Fixing the problem is often as simple as tightening the gas cap.
Symptoms of a Bad or Failing Fuel Pump Relay
If the engine is stalling or not starting, or the fuel pump is not making any noise when the key is on, you may need to replace the fuel pump relay.