misfire on #4 and #6 cylinder. 4.7

Asked by Feb 22, 2017 at 12:13 PM about the 2004 Dodge Ram 1500 ST LB

Question type: General

replaced plugs, coils, injectors, head gasket and had head machined and
cleaned

3 Answers

75,525

P0300 DODGE - Cylinder Misfire Fault Detected Random Cylinders...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...This means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem.

changed plugs, coils, injectors, head gasket, had head cleaned and machined. good compression. Could the computer be an issue since it's only on 2 cylinders thats beside each other

75,525

Check the compression in those 2 cylinders since they are side by side. Suspect a problem there. Since you have done head work check also that the rocker arms are opening the valves.

Your Answer

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 500 nationwide Ram 1500 listings starting at $3,488.

Postal Code:

Dodge Ram 1500 Experts

  • #1
    Dan Connell
    Reputation
    6,510
  • #2
    pudgybear
    Reputation
    6,380
  • #3
    dandyoun
    Reputation
    5,790
View All

Related Models For Sale

Used Ford F-150
594 Great Deals out of 10,717 listings starting at $3,300
Used Chevrolet Silverado 1500
173 Great Deals out of 9,719 listings starting at $1,995
Used Dodge Ram 2500
5 Great Deals out of 90 listings starting at $1,995
Used GMC Sierra 1500
239 Great Deals out of 9,964 listings starting at $399
Used Toyota Tundra
44 Great Deals out of 1,221 listings starting at $2,500
Used Toyota Tacoma
34 Great Deals out of 1,018 listings starting at $7,950
Used Ford F-250 Super Duty
29 Great Deals out of 793 listings starting at $2,475
Used Nissan Titan
26 Great Deals out of 471 listings starting at $6,495
Used Chevrolet Colorado
16 Great Deals out of 1,806 listings starting at $1,999
Used Dodge Dakota
9 Great Deals out of 152 listings starting at $999
Used Dodge Ram 3500
5 Great Deals out of 74 listings starting at $8,800
Used Chevrolet Silverado 2500HD
11 Great Deals out of 1,149 listings starting at $4,995

Used Cars For Sale

2007 Dodge Ram 1500 ST LB For Sale
1 listings starting at $6,999

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.