Q: Engine misfiring and shut off

asked by on

Check engine light came on, went on a drive and my car shut off and didn't want to turn back on. It says my engine is has misfires in cylinders 1-3 i dont know what the problem could be? Please help ?

My car has 170000 miles.
My car has a manual transmission.

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 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?
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. Engine misfiring and shut off

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: Is there anyway to bypass the ac compressor they make bypass pulleys but can't find any for an 88 Grand Prix

As long as the a/c clutch bearing is not seized, it doesn't matter if the a/c compressor is locked up. As long as you do not turn the a/c on, this causing the clutch to engage and attempt to run...

Q: Check Engine Light is on - code P0328

Hi there. A failure of the engine knock sensor is a somewhat risky issue with a turbocharged engine such as yours. Turbocharging increases cylinder pressure during operation and makes the engine more likely to experience "pre-detention" or knocking. The knock...

Q: 2000 vw Golf 2.0 stall on acceleration

There is a possibility that you introduced a vacuum leak when you did this work particularly if these symptoms did not exist prior to the work around the throttle body. Another possibility is the glove may have damaged components or...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.