hey im new to the site so please forgive me if this question has been asked, i looked for it and didn't find it.

i have a 2003 dodge ram 1500 4x4 and it is misfireing. getting a code p0300 and i changed the plugs and nothing happened. just had the engine rebuilt a year and a half ago, apparently by looking at the plugs they didnt include that in the rebuild. i am not to knowladgable on the subject but what else could be wrong? just wanted a little info before i take it in so i know if i am getting smoke blown up my butt.

Thanks for anything and everything.

Quinn

 

Plug wires? You may just want to check the plug connectors to make sure none are loose.

 

plug wires and compression on the cylinders

 

Plug wire could be bad. The injector could be bad. I would also check the compression and see where its at.