My car is a 98 A4 Z. Pretty much stock motor other then a new TSP 231/237 cam. Took it to work today and tripped an SES light. Scanned it and it was a P0300 (random misfires). It is on all cylinders. Any thoughts? Thanks.

 

Yup big cams throw P0300 codes. 2 ways to get rid of it, one is to delete this code, which is what I have done and/or raise some the values in certain tables within edit to avoid the PCM from actually triggering it which is what I did initially but didn't solve it.

 

Very normal to get.I would delete it or change the value's ASAP.It will affect your tranny.

 

Edit out the value of 32767, and change it to 32000, in the low and med tables (low idle by rpm, etc.....). I would not turn the code off, in the event you blow a plug at higher rpm, you will not know and may casue more damage.

 

Thanks for the help, Ill give it a try.