here is the post of which i think you are referencing
http://www.peachparts.com/shopforum/showthread.php?t=148721
PLEASE READ CAREFULLY.....like I said, lots to screw up with maybe little to gain. This helped me stop the pinging due to my own mistake (try to never mess with the delivery valve holders).The car is running much better,but still not to the point it was at before this whole game started. There is a noticeable decrease in power. and i can only attribute this to the improper setting of the #4 element.
For the cost it would be well worth it to remove the pump and have it bench tested....but the above procedure definitely got my car behaving better then it was before "THE MISTAKE"