Hi;
I had my car ecu tuned already with some cams, intake, intake pipe, exhaust etc + bc.....I recently took off my intake pipe and intake to sell because I'm moving on to something more serious and figured it would just make my car run a bit rich. But I've managed to get a CEL twice and I finally went to autozone to get it pulled. I got p0304 and according to the code....it says I'm getting misfiring in 4th cylinder. Does that sound about right for the rich condition I'm experiencing or could this be somethin else...I know everyone normall gets p0300. Any input would be appreciated.

 

bump....any opinions? Plug wires, plugs? Or just running too rich for my own good heh.

 

If you are tuned and getting this, it is likely the tune although most tuners typically go leaner than stock afaik!

Could be 4th cyl injector. Have the stealership check it out.

 

using denso 650 injectors....so I doubt those are failing since they're rather new....my whole car's comin apart for a rebuild soon nehow but I'm just curious what's going on with this.

 

Well it could certainly be a rich condition misfire... a single cylinder misfire should be a lot easier to diagnose than a multicyl though. Good luck.