HELP PLEASE

Asked by Mar 25, 2017 at 03:43 PM about the 2000 Toyota Corolla CE

Question type: Maintenance & Repair

I have a p0303 fault code. Miss fire #3. I
have changed the plugs the coils the maf
sensor and the pcv valve but still
missfiring. I also have oil threads of #3
sparkbplug.

3 Answers

73,845

P0303 TOYOTA - Cylinder 3 Misfire Detected...Possible causes; Faulty spark plug 3, Clogged or faulty fuel injector 3, Faulty ignition coil 3, Fuel injector 3 harness is open or shorted, Fuel injector 3 circuit poor electrical connection, Ignition coil 3 harness is open or shorted, Insufficient cylinder 3 compression, Incorrect fuel pressure, Intake air leak...The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 3. If the problem persist more tests needs to be done to diagnose problem.

There are no leaks on intake and I've already changed plugs and coil over.

73,845

There is more to check.

Your Answer

Corolla

Looking for a Used Corolla in your area?

CarGurus has 56,697 nationwide Corolla listings starting at $1,488.

ZIP:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,470
  • #2
    tenspeed
    Reputation
    1,840
  • #3
    tennisshoes
    Reputation
    1,770
View All

Related Models For Sale

Used Toyota Camry
1,023 Great Deals out of 73,437 listings starting at $295
Used Honda Civic
778 Great Deals out of 73,003 listings starting at $1,400
Used Honda Accord
1,086 Great Deals out of 61,516 listings starting at $1,099
Used Toyota RAV4
804 Great Deals out of 50,161 listings starting at $1,500
Used Nissan Altima
956 Great Deals out of 75,068 listings starting at $1,300
Used Nissan Sentra
523 Great Deals out of 49,896 listings starting at $2,495
Used Hyundai Elantra
483 Great Deals out of 42,672 listings starting at $2,295
Used Toyota Tacoma
639 Great Deals out of 42,799 listings starting at $1,500
Used Toyota Prius
318 Great Deals out of 16,988 listings starting at $1,634
Used Honda CR-V
804 Great Deals out of 54,341 listings starting at $1,750
Used Toyota Yaris
61 Great Deals out of 3,046 listings starting at $2,200
Used Hyundai Sonata
698 Great Deals out of 49,886 listings starting at $500
Used Ford Focus
746 Great Deals out of 52,778 listings starting at $999

Used Cars For Sale

2018 Toyota Corolla For Sale
10,395 listings starting at $16,731
2017 Toyota Corolla For Sale
24 Great Deals out of 20,620 listings starting at $11,400
2016 Toyota Corolla For Sale
137 Great Deals out of 5,910 listings starting at $7,490
2015 Toyota Corolla For Sale
164 Great Deals out of 5,050 listings starting at $8,300
2014 Toyota Corolla For Sale
199 Great Deals out of 4,665 listings starting at $7,100

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.