Q: Engine misfire - 2005 Chrysler 300

asked by on

The car is coding an engine misfire P0300 and P0303 and is physically chugging, has no power in 1st gear and literally feels like the car is going to shut down while in idle (chugs violently and the dash lights flicker, etc.). All the spark plugs and ignition coils are now new but this has not changed the misfiring or coding issues.

What would be the next step for an amateur DIY'er?

My car has 300000 miles.
My car has an automatic transmission.

Code P0300 relates to a random cylinder misfiring which can be caused by many different issues such as the following:

I would recommend starting by checking for intake leaks as these are a common cause for this as well. Code P0303 relates specifically to cylinder #3 and can be caused by the same issues as mentioned above. This code may also be related to code P0300 as well.

If you would like to further assistance with this, a certified technician from YourMechanic can come to your location to diagnose the misfire firsthand so that the proper repair can be made.

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 misfire - 2005 Chrysler 300

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: How do I change modes with the engine start/stop switch?

If your car is equipped with the smart key system, it means that you have a start/stop switch rather than a conventional ignition switch. This allows you to crank the engine from all positions by pressing the button (with your...

Q: Q: Misfire on cylinder 8

It could be the spark plug, ignition coil, or coil boot causing the misfire. You may also have dirty fuel injectors that need to be cleaned. Have the ECM scanned to see if the misfire code is P0308. This code...

Q: 2003 Hyundai Sonata 2.7 v6. Hello my car randomly bucks / jerks at stop lights in drive and is way worse and constant when the ac is on.

Hi there. It sounds like your engine is misfiring. Check the spark plug and wires to see if they are firing. If the spark plugs are firing, then the fuel pump could have an issue or the injectors could be...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...