Skip the auto shop - Our mechanics make house calls

Q: Jerking reaction when accelerating

asked by on

my dart has what feels like a misfire, is backfiring out of the exhaust and is like bucking on acceleration but no cel or underlying codes. i was please hoping to get an answer as to whether it just seems like a misfire like coil or spark problem, the turbo is going, or because of the non cel if the pcm is not acting as it should

My car has 71250 miles.
My car has a manual transmission.

What you are describing sounds like an ignition problem or a lean fuel issue. I would start with checking items like the mass air flow sensor, O2 sensor, etc. since these types of items can affect air/fuel mixture controlling the leaning out or richening up of the motor. As you may know, misfires can be caused by many different things. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly. When the misfire results from a fuel related issue, this is commonly related to a lean fuel condition (lack of sufficient fuel supply to the motor). Fuel related misfires can be caused by many different things such as low fuel pressure, faulty or dirty fuel injectors, a faulty O2 sensor, a dirty or failing mass air-flow sensor, a faulty or dirty idle air control valve or a vacuum or intake leak. When the fuel supplied to the combustion chamber is insufficient, this results in an ignition (spark) that is igniting a less than balanced load of fuel and air. This results in a misfire or an explosion in the cylinder that is much less powerful than the other cylinders. This creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing. Due to the number of different things that may cause an engine misfire, the quickest and easiest way to diagnose this type of problem is to hook the vehicle up to a scanning tool which will download any potential fault codes that may have registered in the vehicle’s computer as a result of the poor running condition. I would recommend having an expert from YourMechanic come to your location to diagnose your misfiring problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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. Jerking reaction when accelerating

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: Grinding noise when braking

You should have your brakes inspected for any issues like metal to metal grinding or another related issue. This may just be a brake pad service issue or a more serious problem with the ESC. Only a thorough check will...

Q: Car has trouble moving forward and backwards. Do you know how to fix?

With the information given, a proper diagnosis cannot be given. However, hopefully we can steer you in a direction that will help. At first it sounds like a clutch issue. The clutch may be failing to disengage entirely once the...

Q: Could it be the coolant sensor?

Hi and thank you for contacting YourMechanic. If your vehicle engine is overheating, there are 3 different things that can cause this problem. The first is the thermostat is not opening up. A stuck thermostat will cause an engine to...

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...
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...
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.