Mack truck performance
 

I am wondering if anyone can tell me how to turn up the fuel on a mack E6 4 valve with ambac 300 series pump, or point me in the direction of a web sight. I want the old bull dog to bark again!!!

https://www.dieselbombers.com/big-ri...n-up-mack.html try here at this post and see if it will help ya and welcome to diesel bombers:yeah: