Q: Car idles rough, hesitate from a stop, shuts off going uphill

asked by on

My car has been idling rough. It has a TBI fuel injection system. The gas mileage has been dropping. The car would hesitate each time I accelerated from a traffic light or any stop. If I try to give it gas while going uphill, the car shuts off. I was wondering if there is some kind of sensor that went bad and is causing all this. What do you think is causing this problems?

Hello there, this is a common fault on the Chevy K2500. There are many different possible causes for the engine to idle rough and have poor gas milage. The most common are the spark plugs, plug wires, cap & rotor, fuel filter, fuel pump, vacuum leak, or exhaust leak. A sensor issue could also cause this, but is less likely than the other items I have listed. To properly diagnose this fault, simple items like the spark plugs, wires, cap and rotor will be checked first. If they are worn, these are usually the places technicians will start. A qualified technician, such as one from YourMechanic, will be able to diagnose the rough idle and poor gas mileage in order to perform any repairs required.

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. Car idles rough, hesitate from a stop, shuts off going uphill

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: Defroster not working

Hi, the problem could be the defroster grid has separated from the main power clip/tab. To reattach the tabs, remove the metal clip out of the connectors and use a tab repair kit to repair the problem. Replace the separated...

Q: Improving gas mileage - 2012 Mitsubishi Outlander Sport

The savings in gas, if they exist, would only be between 0 and 5 percent. The only way to know for sure is do a test: drive the car a specified distance, with and without 4WD and compare the results...

Q: Massive hesitation between 1-2 shifting and nearly dies occassionally at stop.

Hi there. It seems that the EGR (Exhaust Gas Recirculation) Valve is stuck and not allowing the engine to run good causing the engine to hesitate, especially when shifting. Take the EGR off and clean it. Then put it back...

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...
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...
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.