StangStang

Hello!!! Ok I just bought my 92 mustang 5.0 LX. I was driving it today and it started to miss fire. I checked my sparkplugs and found 1 to be carbond up!! The plugs are bosch platinum 4... I have a few questions. I know I need to replace the plug. Is my cylinder going to be just as bad as the plug? Is this the reason my oil is so dirty? What can I do to clean the cylinders?? Could oil consumption in this cylinder cause the plug to carbon up? If you have any questions feel free to ask me. Thanks for your time!!!

90GTRagtop

You can use Seafoam to clean the upper intake and cylinders, but you need to find the cause of the misfire. Be certain to check your wires and distributer cap for any problems. To use the seafoam, check the procedure on their site; http://www.seafoamsales.com/motorTuneUpTechGas.htm

ZachW04Stang

Your oil is probably real dirty because you either have a lot of blow by or it hasn't been changed in while. Have you checked your timing? Could be a simple solution to stoping the misfire. Also try running high test and see if it stops the misfire.