Q: Can't get power at all. Misfire with code P0303.

asked by on

Can't get power at all.. misfire p0303

My car has 65000 miles.
My car has an automatic transmission.

Hi there. The code P0303 means that cylinder number 3 has a misfire. There are three ways that the cylinder number 3 can be misfiring.

  • Spark plug is fouled out and not creating a strong enough spark to ignite the fuel
  • Fuel injector is clogged or has stopped working and not spraying any fuel
  • A burned valve, burned piston rings, or a hole in the piston that will cause the cylinder temperature to drop causing the fuel to not burn

Check the spark plug on the cylinder number 3 and see if there is a suffucient amount of spark. If the spark is there and is strong, then check the fuel injector and see if it’s spraying or not by unplugging the injector as the engine is running. If the engine try’s to stumble more, then the fuel injector is working. If there is no change, then the fuel injector is not working. If the spark plug and fuel injector is working, then there could be internal damaged to the cylinder. If you need further assistance with your engine misfiring, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Can't get power at all. Misfire with code P0303.

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: Q: Headlights not turning on

If both headlamps are not working and the bulbs are in good condition, I suspect the head lamp switch is faulty. The head lamp switch on your vehicle houses several other functions like the turn signals and the cruise control...

Q: Engine misfires intermittently.

The most common cause of a random misfire on the Tribute is a failing ignition coil. The computer should be scanned to see if there are any codes and then the engine data should be monitored to see what the...

Q: Blower Motor only working on highest speed.

You mentioned that you started to smell something. This may be a sign that the blower controller or the resistor was burnt out when it was hooked up wrong. You should try replacing the blower controlling resistor that you hooked...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.