I have been getting a engine missfire code P0300. There has been no SES light, but found it while ataping. The car has 6500 miles on it so plugs or wires should not be the issue. Can my converter be causing this? I have a Yank ST3200 and the codes have appeared after the install. The car also sometimes will stall when in reverse.
Please help.
Thanks
Marco

 

you might need to get your idle raised. does it misfire at idle, or at a higher rpm?

 

The computer may not have adjusted to the lighter weight of the converter. Clear the computer and do the idle relearn.

 

i got the same code the other day while driving to work. the car started running really rough for about 5 minutes then all of a sudden quit. now i have the stock converter, but it hasnt done it since. ??? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />