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My daughters nitro is giving me problems and she is in college 4hrs away. I purchased her a bluetooth obd2 reader so i could see what codes it was throwing and it comes up with a p0305 (number 5 cylinder missfire).So we have already changed the plugs and the coil packs and its still having the same issue. If i have her remove the neg cable the problem will go away and not come back for a couple weeks. It dosnt seem to be somthing major due to it going away after a reset. Has anyone else had this same issue. Thanks any help would be appreciated
 

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Po 305

Welcome dirtcrazy04

Have you seen this?

Possible Solutions

If 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.
 
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