I am having a bit of trouble with the spark advance.. The PCM is advancing more as rpms go up yet my extended spark tables are set straight and in other instances lower...

What can I do for the PCM to keep a constant spark advance???

 

More details please. What is your coolant temp at the time? and is your computer modifying the timing tables based upon this temp? do you have KR? What are the conditions?

This may help us answer.

Ben

 

80-84C

The computer has the correction to 0 on those temp ranges and no knock retard...

I found out that the PCM adds 2 degress up to 4000 at 4500 its 3 and at 5500 its 4.