I have a 2005 Dodge Neon that is indicating misfires with codes P0300, P0303, P0304. The spark plugs and wires have already been changed. What could be the most likely cause?

10

Asked by Apr 05, 2017 at 08:45 PM about the 2005 Dodge Neon 4 Dr SE Sedan

Question type: Maintenance & Repair

8 Answers

75,485

Possible causes; Faulty spark plug (s), Faulty ignition coil (s), Clogged or faulty fuel injector (s), Intake air leak, Fuel injectors harness is open or shorted, Fuel Injectors circuit poor electrical connection, Ignition coils harness is open or shorted, Ignition coils circuit poor electrical connection, Insufficient cylinders compression, Incorrect fuel pressure.

10

It's an intermittent problem.

75,485

Then it is going to be electrical.

75,485

Look at the electrical causes above.

10

Would the coil pack be the most likely cause?

1 of 1 people found this helpful.
261,245

https://www.cargurus.com/Cars/Discussion-t4163_ds689748

261,245

https://www.cargurus.com/Cars/Discussion-t4287_ds706279

75,485

Thanks Tom, still haven't figured out how you do that...So the coil could have a crack, or weak, that can be tested at an auto parts store, spark plug wires would be the other most common. You probably should check compression first to know the condition of the engine before putting any money into it.

Your Answer

Neon

Looking for a Used Neon in your area?

CarGurus has 11 nationwide Neon listings and the tools to find you a great deal.

Postal Code:

Dodge Neon Experts

  • #1
    Justin Gilmore
    Reputation
    1,390
  • #2
    Matt Thibault
    Reputation
    1,000
  • #3
    Scott Goodyear
    Reputation
    850
View All

Related Models For Sale

Used Honda Civic
318 Great Deals out of 3,578 listings starting at $1,795
Used Dodge Charger
74 Great Deals out of 802 listings starting at $2,000
Used Ford Focus
107 Great Deals out of 2,626 listings starting at $1,095
Used Toyota Corolla
294 Great Deals out of 4,067 listings starting at $1,400
Used Ford Mustang
9 Great Deals out of 1,075 listings starting at $3,000
Used Chevrolet Cobalt
35 Great Deals out of 299 listings starting at $1,190
Used Honda Accord
86 Great Deals out of 1,037 listings starting at $795
Used BMW 3 Series
157 Great Deals out of 1,846 listings starting at $2,500
Used Mitsubishi Lancer Evolution
6 Great Deals out of 35 listings starting at $18,000
Used Dodge Ram 1500
40 Great Deals out of 498 listings starting at $3,488

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.