May 3, 2011Hi guys and gals, my 04 has for the second time thrown a 303 code/#3 miss fire, now the first time I put 2 bottles of seafoam ofcourse not all at once, it was over a 4 fill up phase and that didn`t work so I called Summit and got my E3 plugs switched out since E3 has a life time warranty or 100k. Now that worked I changed out the coil packs and put new ones on along with the new plugs. The problem went away for almost a year now its back and I pulled out the #1 plug and #3 plug switched them cleared the code and now I am wondering if I may need to do something different any one else had a similar issue?
Subscribers : Kerb
May 4, 2011When you say it`s back do you mean the same code? missfire on #3? did the code follow the plug when you switched 1 and 3?
the first thing I would say is switch back to a normal spark plug instead of those POS E3`s. If the problem persists then you know it`s not the plugs and you can switch back, but I have a feeling that will be the issue
May 4, 2011P0303 Code - Cylinder #3 Misfire
Technical DescriptionCylinder #3 Misfire Detected
What does that mean?A P0303 code means that the the car`s computer has detected that one of the engine`s cylinders is not firing properly. In this case it`s cylinder #3.
SymptomsSymptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present
CausesA code P0303 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Possible SolutionsIf there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I`ve also heard in other cases the problems were faulty fuel injectors.
Cover Me, I`m Reloading!
May 6, 2011Amber you and I differ on the E3 plugs I am still trying to discover why the hesitation is happening it only seems to do it when I stomp on it, now I did switch the plugs and coils around and the problem is still there but only when I get on it once it shifts out into overdrive the hesitation is gone!! Weird u would think it would be consistent! I am gonna call summit and have them send out new plugs to see if its the plug, I shouldn`t have to do that since there not even 2yrs old and have less than 15k miles, while I have them on the phone I am ordering new O2 sensors as well even tho I doubt they are doing that but 1 more thing to check off list.....
May 6, 2011I`m just giving you my suggestion.... many many people have had problems with those plugs, and the easiest way to rule them out is to go to the store and by some plain ole copper cores and put em in.
Your getting hesitation and a reoccurring missfire with plugs that lots of people have issues with... seems pretty obvious to me where you should start
May 7, 2011I appreciate your advise, at this point I am not ruling anything out when I do I will post again!!!
May 15, 2011ok, autolite 3923 plugs work great in the 4.7, copper core plugs is what the 4.7 loves, also your fault maybe a failing head gasket depending on the mileage, I boost a 125 shot of nitrous into my 4.7 on a regular basis at the track, and i constantly need to change my plugs because of this, but normal wear and tear might be an internal issue with you
That right i did it, cry to tears in a bucket, **** it, lets take it to the stage
May 16, 2011Ok I have installed those Autolite plugs and so far they are working out pretty well, I have also just done the transmission filters I had no idea that these Dakota trucks take 2 separate filters and that u need a special tool to get the one that looks like a oil filter off but its all good it only took me 2 hours plus 3 trips back to the auto store lol.....I didn`t realize how expensive it was 5 in half quarts of fluid later moving to the next job!!!! Thanks for the tips!!!
July 8, 2011Hey guys. Since you are talking about V8 engine here might as well ask what engine kits would be the best to use on this kind of engine? Thanks.